Faculty Profiles - MATSUI Yusuke

Papers - MATSUI Yusuke

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Comparison of robotic versus manual needle insertion for CT-guided intervention: prospective randomized trial Reviewed

Takao Hiraki, Yusuke Matsui, Jun Sakurai, Koji Tomita, Mayu Uka, Soichiro Kajita, Noriyuki Umakoshi, Toshihiro Iguchi, Michihiro Yoshida, Kota Sakamoto, Takayuki Matsuno, Tetsushi Kamegawa

Radiology Advances 2 ( 2 ) 2025.3

Publishing type：Research paper (scientific journal) Publisher：Oxford University Press (OUP)

Abstract

Background

Robotic needle insertion under CT guidance has been developed, but data on comparison with manual insertion are still lacking.

Purpose

To compare robotic versus manual needle insertion for CT fluoroscopy-guided intervention, primarily in terms of insertion accuracy.

Materials and Methods

This was a prospective study between May 2020 and March 2023 at a single site. The cohort comprised 22 patients undergoing CT (Aquilion One or Aquilion CX; Canon Medical Systems) fluoroscopy-guided biopsy, who were randomly allocated to either the robotic or manual group. The robot used (Zerobot; Medicalnet Okayama) is not yet commercially available. A biopsy introducer needle was inserted by 1 of 3 physicians using a remote-control robot in the robotic group, versus by 1 of 3 different physicians by hand in the manual group. The primary endpoint was needle insertion accuracy, which was defined as the 3-dimensional Euclidean distance between a predetermined target point and the needle tip after insertion. The non-inferiority of robotic insertion to manual one was then tested. Adverse events were evaluated. Statistical comparisons were made between the 2 groups.

Results

Technical success and pathological findings were confirmed in all patients of the 2 groups. The mean and SD of needle insertion were 4.8 mm ± 2.6 in the robotic group and 7.0 mm ± 3.1 in the manual group (P &lt; .001). The mean difference in accuracy between the 2 groups (robotic minus manual group) was −2.1 mm (95% CI, −4.7 to 0.4). Effective dose to physicians was zero in all cases in the robotic group, while median dose was 1.0 µSv in the manual group (P &lt; .001). Dose length product to patients was not significantly different between the 2 groups (P = .100). No major adverse events were observed.

Conclusion

Robotic needle insertion was non-inferior to manual insertion in terms of accuracy, while it effectively eliminated radiation exposure to physicians.

Trial registration number

jRCT2062200013

DOI： 10.1093/radadv/umaf010

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Other Link： https://academic.oup.com/radadv/article-pdf/2/2/umaf010/62871840/umaf010.pdf

Recent topics in musculoskeletal imaging focused on clinical applications of AI: How should radiologists approach and use AI? Reviewed

Taiki Nozaki, Masahiro Hashimoto, Daiju Ueda, Shohei Fujita, Yasutaka Fushimi, Koji Kamagata, Yusuke Matsui, Rintaro Ito, Takahiro Tsuboyama, Fuminari Tatsugami, Noriyuki Fujima, Kenji Hirata, Masahiro Yanagawa, Akira Yamada, Tomoyuki Fujioka, Mariko Kawamura, Takeshi Nakaura, Shinji Naganawa

La radiologia medica 2025.2

Stereotactic arrhythmia radioablation for ventricular tachycardia: a review of clinical trials and emerging roles of imaging Reviewed

Mariko Kawamura, Masafumi Shimojo, Fuminari Tatsugami, Kenji Hirata, Shohei Fujita, Daiju Ueda, Yusuke Matsui, Yasutaka Fushimi, Tomoyuki Fujioka, Taiki Nozaki, Akira Yamada, Rintaro Ito, Noriyuki Fujima, Masahiro Yanagawa, Takeshi Nakaura, Takahiro Tsuboyama, Koji Kamagata, Shinji Naganawa

Journal of Radiation Research 2024.12

Publishing type：Research paper (scientific journal) Publisher：Oxford University Press (OUP)

ABSTRACT

Ventricular tachycardia (VT) is a severe arrhythmia commonly treated with implantable cardioverter defibrillators, antiarrhythmic drugs and catheter ablation (CA). Although CA is effective in reducing recurrent VT, its impact on survival remains uncertain, especially in patients with extensive scarring. Stereotactic arrhythmia radioablation (STAR) has emerged as a novel treatment for VT in patients unresponsive to CA, leveraging techniques from stereotactic body radiation therapy used in cancer treatments. Recent clinical trials and case series have demonstrated the short-term efficacy and safety of STAR, although long-term outcomes remain unclear. Imaging techniques, such as electroanatomical mapping, contrast-enhanced magnetic resonance imaging and nuclear imaging, play a crucial role in treatment planning by identifying VT substrates and guiding target delineation. However, challenges persist owing to the complex anatomy and variability in target volume definitions. Advances in imaging and artificial intelligence are expected to improve the precision and efficacy of STAR. The exact mechanisms underlying the antiarrhythmic effects of STAR, including potential fibrosis and improvement in cardiac conduction, are still being explored. Despite its potential, STAR should be cautiously applied in prospective clinical trials, with a focus on optimizing dose delivery and understanding long-term outcomes. Collaborative efforts are necessary to standardize treatment strategies and enhance the quality of life for patients with refractory VT.

DOI： 10.1093/jrr/rrae090

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Advancing clinical MRI exams with artificial intelligence: Japan’s contributions and future prospects Reviewed

Shohei Fujita, Yasutaka Fushimi, Rintaro Ito, Yusuke Matsui, Fuminari Tatsugami, Tomoyuki Fujioka, Daiju Ueda, Noriyuki Fujima, Kenji Hirata, Takahiro Tsuboyama, Taiki Nozaki, Masahiro Yanagawa, Koji Kamagata, Mariko Kawamura, Akira Yamada, Takeshi Nakaura, Shinji Naganawa

Japanese Journal of Radiology 2024.11

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

In this narrative review, we review the applications of artificial intelligence (AI) into clinical magnetic resonance imaging (MRI) exams, with a particular focus on Japan’s contributions to this field. In the first part of the review, we introduce the various applications of AI in optimizing different aspects of the MRI process, including scan protocols, patient preparation, image acquisition, image reconstruction, and postprocessing techniques. Additionally, we examine AI’s growing influence in clinical decision-making, particularly in areas such as segmentation, radiation therapy planning, and reporting assistance. By emphasizing studies conducted in Japan, we highlight the nation’s contributions to the advancement of AI in MRI. In the latter part of the review, we highlight the characteristics that make Japan a unique environment for the development and implementation of AI in MRI examinations. Japan’s healthcare landscape is distinguished by several key factors that collectively create a fertile ground for AI research and development. Notably, Japan boasts one of the highest densities of MRI scanners per capita globally, ensuring widespread access to the exam. Japan’s national health insurance system plays a pivotal role by providing MRI scans to all citizens irrespective of socioeconomic status, which facilitates the collection of inclusive and unbiased imaging data across a diverse population. Japan’s extensive health screening programs, coupled with collaborative research initiatives like the Japan Medical Imaging Database (J-MID), enable the aggregation and sharing of large, high-quality datasets. With its technological expertise and healthcare infrastructure, Japan is well-positioned to make meaningful contributions to the MRI–AI domain. The collaborative efforts of researchers, clinicians, and technology experts, including those in Japan, will continue to advance the future of AI in clinical MRI, potentially leading to improvements in patient care and healthcare efficiency.

DOI： 10.1007/s11604-024-01689-y

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Other Link： https://link.springer.com/article/10.1007/s11604-024-01689-y/fulltext.html

Applications of artificial intelligence in interventional oncology: An up-to-date review of the literature Invited Reviewed

Yusuke Matsui, Daiju Ueda, Shohei Fujita, Yasutaka Fushimi, Takahiro Tsuboyama, Koji Kamagata, Rintaro Ito, Masahiro Yanagawa, Akira Yamada, Mariko Kawamura, Takeshi Nakaura, Noriyuki Fujima, Taiki Nozaki, Fuminari Tatsugami, Tomoyuki Fujioka, Kenji Hirata, Shinji Naganawa

Japanese Journal of Radiology 2024.10

Authorship：Lead author,　Corresponding author Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Interventional oncology provides image-guided therapies, including transarterial tumor embolization and percutaneous tumor ablation, for malignant tumors in a minimally invasive manner. As in other medical fields, the application of artificial intelligence (AI) in interventional oncology has garnered significant attention. This narrative review describes the current state of AI applications in interventional oncology based on recent literature. A literature search revealed a rapid increase in the number of studies relevant to this topic recently. Investigators have attempted to use AI for various tasks, including automatic segmentation of organs, tumors, and treatment areas; treatment simulation; improvement of intraprocedural image quality; prediction of treatment outcomes; and detection of post-treatment recurrence. Among these, the AI-based prediction of treatment outcomes has been the most studied. Various deep and conventional machine learning algorithms have been proposed for these tasks. Radiomics has often been incorporated into prediction and detection models. Current literature suggests that AI is potentially useful in various aspects of interventional oncology, from treatment planning to post-treatment follow-up. However, most AI-based methods discussed in this review are still at the research stage, and few have been implemented in clinical practice. To achieve widespread adoption of AI technologies in interventional oncology procedures, further research on their reliability and clinical utility is necessary. Nevertheless, considering the rapid research progress in this field, various AI technologies will be integrated into interventional oncology practices in the near future.

DOI： 10.1007/s11604-024-01668-3

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Other Link： https://link.springer.com/article/10.1007/s11604-024-01668-3/fulltext.html

Generative AI and large language models in nuclear medicine: current status and future prospects Reviewed

Kenji Hirata, Yusuke Matsui, Akira Yamada, Tomoyuki Fujioka, Masahiro Yanagawa, Takeshi Nakaura, Rintaro Ito, Daiju Ueda, Shohei Fujita, Fuminari Tatsugami, Yasutaka Fushimi, Takahiro Tsuboyama, Koji Kamagata, Taiki Nozaki, Noriyuki Fujima, Mariko Kawamura, Shinji Naganawa

Annals of Nuclear Medicine 2024.9

Evaluation of a novel central venous access port for direct catheter insertion without a peel-away sheath. Reviewed

Toshihiro Iguchi, Takahiro Kawabata, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Soichiro Okamoto, Kazuaki Munetomo, Takao Hiraki

Japanese journal of radiology 2024.9

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: This study retrospectively evaluated the feasibility and safety of implanting a newly developed central venous access port (CV-port) that allows catheter insertion into a vein without the use of a peel-away sheath, with a focus on its potential to minimize risks associated with conventional implantation methods. MATERIALS AND METHODS: All procedures were performed using a new device (P-U CelSite Port™ MS; Toray Medical, Tokyo, Japan) under ultrasound guidance. The primary endpoint was the implantation success rate. The secondary endpoints were the safety and risk factors for infection in the early postprocedural period (< 30 days). RESULTS: We assessed 523 CV-port implantations performed in a cumulative total of 523 patients (240 men and 283 women; mean age, 61.6 ± 13.1 years; range, 18-85 years). All implantations were successfully performed using an inner guide tube and over-the-wire technique through 522 internal jugular veins and one subclavian vein. The mean procedural time was 33.2 ± 10.9 min (range 15-112 min). Air embolism, rupture/perforation of the superior vena cava, or hemothorax did not occur during catheter insertion. Eleven (2.1%) intraprocedural complications occurred, including Grade I arrhythmia (n = 8) and subcutaneous bleeding (n = 1), Grade II arrhythmia (n = 1), and Grade IIIa pneumothorax (n = 1). Furthermore, 496 patients were followed up for ≥ 30 days. Six early postprocedural complications were encountered (1.1%), including Grade IIIa infection (n = 4), catheter occlusion (n = 1), and skin necrosis due to subcutaneous leakage of trabectedin (n = 1). These six CV-ports were withdrawn, and no significant risk factors for infection in the early postprocedural period were identified. CONCLUSION: The implantation of this CV-port device demonstrated comparable success and complication rates to conventional devices, with the added potential benefit of eliminating complications associated with the use of a peel-away sheath.

DOI： 10.1007/s11604-024-01658-5

PubMed

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Cranial and spinal computed tomography (CT) angiography with photon-counting detector CT: comparison with angiographic and operative findings Reviewed

Fumiyo Higaki, Masafumi Hiramatsu, Takao Yasuhara, Susumu Sasada, Yoshihiro Otani, Jun Haruma, Tomohiro Inoue, Yusuke Morimitsu, Noriaki Akagi, Yusuke Matsui, Toshihiro Iguchi, Takao Hiraki

Japanese Journal of Radiology 2024.9

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

The clinical imaging features of photon-counting detector (PCD) computed tomography (CT) are mainly known as dose reduction, improvement of spatial resolution, and reduction of artifacts compared to energy-integrating detector CT (EID-CT). The utility of cranial and spinal PCD-CT and PCD-CT angiography (CTA) has been previously reported. CTA is a widely used technique for noninvasive evaluation. Cranial CTA is important in brain tumors, especially glioblastoma; it evaluates whether the tumor is highly vascularized prior to an operation and helps in the diagnosis and assessment of bleeding risk. Spinal CTA has an important role in the estimation of feeders and drainers prior to selective angiography in the cases of spinal epidural arteriovenous fistulas and spinal tumors, especially in hemangioblastoma. So far, EID-CTA is commonly performed in an adjunctive role prior to selective angiography; PCD-CTA with high spatial resolution can be an alternative to selective angiography. In the cases of cerebral aneurysms, flow diverters are important tools for the treatment of intracranial aneurysms, and postoperative evaluation with cone beam CT with angiography using diluted contrast media is performed to evaluate stent adhesion and in-stent thrombosis. If CTA can replace selective angiography, it will be less invasive for the patient. In this review, we present representative cases with PCD-CT. We also show how well the cranial and spinal PCD-CTA approaches the accuracy of angiographic and intraoperative findings.

DOI： 10.1007/s11604-024-01661-w

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Other Link： https://link.springer.com/article/10.1007/s11604-024-01661-w/fulltext.html

Clinical T1a Renal Cell Carcinoma with Solitary Diaphragmatic Metastasis in a Patient with von Hippel-Lindau Disease Reviewed

Tadataka Hirai, Mayu Uka, Toshihiro Iguchi, Kazuya Yasui, Takahiro Kawabata, Noriyuki Umakoshi, Koji Tomita, Yusuke Matsui, Yasuyuki Kobayashi, Motoo Araki, Takao Hiraki

Journal of Kidney Cancer and VHL 11 ( 3 ) 23 - 26 2024.8

Publishing type：Research paper (scientific journal) Publisher：Codon Publications

We report the case of a 38-year-old man with two von Hippel-Lindau disease-associated T1a renal cell carcinomas (RCCs) (<2 cm in diameter) which developed into a 2.5-cm solitary diaphragmatic metastatic tumor. After diagnosis using percutaneous biopsy, the diaphragmatic metastasis and two RCCs were treated by laparoscopic resection and percutaneous cryoablation, respectively. One year after treatment, the patient survived without local recurrence or distant metastasis. This report describes a rare case of RCC metastasis in VHL disease and its treatment.

DOI： 10.15586/jkcvhl.v11i3.342

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Other Link： https://www.jkcvhl.com/index.php/jkcvhl/article/download/342/575

Portal Venous Thrombosis after Percutaneous Cryoablation for Renal Cell Carcinoma Reviewed

Takahiro Kawabata, Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takao Hiraki

Journal of Kidney Cancer and VHL 11 ( 2 ) 39 - 42 2024.7

Publishing type：Research paper (scientific journal) Publisher：Codon Publications

A 50-year-old man with von Hippel–Lindau disease underwent cryoablation (CRA) for two adjacent renal cell carcinomas in the upper pole of his right kidney. Although computed tomography (CT) immediately after CRA revealed involvement of part of the liver parenchyma in the ice-ball, the treatment was completed without complications. Contrast-enhanced CT on day 2 post-CRA revealed a thrombus in the portal vein of segment 6 near the ablated liver parenchyma, prompting the initiation of oral anticoagulation. The patient was discharged on day 4 after CRA without any sequelae, and a follow-up contrast-enhanced CT done 6 weeks later demonstrated resolution of the portal vein thrombus.

DOI： 10.15586/jkcvhl.v11i2.347

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Other Link： https://jkcvhl.com/index.php/jkcvhl/article/download/347/566

Climate change and artificial intelligence in healthcare: Review and recommendations towards a sustainable future Reviewed

Daiju Ueda, Shannon L Walston, Shohei Fujita, Yasutaka Fushimi, Takahiro Tsuboyama, Koji Kamagata, Akira Yamada, Masahiro Yanagawa, Rintaro Ito, Noriyuki Fujima, Mariko Kawamura, Takeshi Nakaura, Yusuke Matsui, Fuminari Tatsugami, Tomoyuki Fujioka, Taiki Nozaki, Kenji Hirata, Shinji Naganawa

Diagnostic and Interventional Imaging 2024.6

Mimicking Cryoprobe Fracture During Renal Cryoablation Due to Contrast Media Concentration: A Case Report with Verification Reviewed

Kazuaki Munetomo, Koji Tomita, Toshihiro Iguchi, Yusuke Matsui, Mayu Uka, Takao Hiraki

CardioVascular and Interventional Radiology 2024.5

Is cryoablation a valid option for renal cell carcinomas in direct contact with critical organs? Reviewed

Shoma Nagata, Yusuke Matsui, Koji Tomita, Mayu Uka, Takahiro Kawabata, Noriyuki Umakoshi, Kazuaki Munetomo, Maria Kawada, Toshihiro Iguchi, Takao Hiraki

Minimally Invasive Therapy & Allied Technologies 1 - 9 2024.5

Ablation of Kidney Tumors in Patients with Substantial Kidney Impairment: Current Status Reviewed

Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Hideo Gobara, Motoo Araki, Takao Hiraki

Current Oncology Reports 2024.4

The impact of large language models on radiology: a guide for radiologists on the latest innovations in AI Reviewed

Takeshi Nakaura, Rintaro Ito, Daiju Ueda, Taiki Nozaki, Yasutaka Fushimi, Yusuke Matsui, Masahiro Yanagawa, Akira Yamada, Takahiro Tsuboyama, Noriyuki Fujima, Fuminari Tatsugami, Kenji Hirata, Shohei Fujita, Koji Kamagata, Tomoyuki Fujioka, Mariko Kawamura, Shinji Naganawa

Japanese Journal of Radiology 42 ( 7 ) 685 - 696 2024.3

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

The advent of Deep Learning (DL) has significantly propelled the field of diagnostic radiology forward by enhancing image analysis and interpretation. The introduction of the Transformer architecture, followed by the development of Large Language Models (LLMs), has further revolutionized this domain. LLMs now possess the potential to automate and refine the radiology workflow, extending from report generation to assistance in diagnostics and patient care. The integration of multimodal technology with LLMs could potentially leapfrog these applications to unprecedented levels.

However, LLMs come with unresolved challenges such as information hallucinations and biases, which can affect clinical reliability. Despite these issues, the legislative and guideline frameworks have yet to catch up with technological advancements. Radiologists must acquire a thorough understanding of these technologies to leverage LLMs’ potential to the fullest while maintaining medical safety and ethics. This review aims to aid in that endeavor.

DOI： 10.1007/s11604-024-01552-0

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Other Link： https://link.springer.com/article/10.1007/s11604-024-01552-0/fulltext.html

Transarterial Embolization for Cystic Artery Pseudoaneurysm Caused by Hepatocellular Carcinoma Rupture in the Gallbladder: A Case Report Reviewed

Soichiro Okamoto, Yusuke Matsui, Shoichi Komoto, Takao Hiraki

Cureus 2024.3

Depiction rate of feeding arteries of renal cell carcinoma on four-dimensional computed tomography angiography. Reviewed

Kazuaki Munetomo, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Yusuke Morimitsu, Toshihiro Iguchi, Takao Hiraki

Japanese journal of radiology 2024.2

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

PURPOSE: To retrospectively evaluate the depiction rate of feeding arteries in biopsy-proven clear cell renal cell carcinoma (CCRCC) on four-dimensional computed tomography angiography (4D-CTA) images. MATERIALS AND METHODS: This study included 22 patients with 22 CCRCC and 30 feeding arteries treated with transcatheter renal artery embolization. The depiction rate of the feeding arteries on preprocedural 4D-CTA was evaluated. Images were acquired by 320-row multi-detector computed tomography (CT) 15‒36 s after starting to inject a contrast agent (600 mg/kg iodine) intravenously into patients at 2.1 s intervals (11 phases). Two board-certified radiologists retrospectively assessed the feeder depiction rate in all 11 phases with reference to the procedural images as the gold standard. Discrepancies were resolved by consultation with a third radiologist. RESULTS: Among the feeders, 11 (36.7%) were segmental or lobar, and 19 (63.3%) were interlobar or arcuate arteries. The feeder depiction rate was the highest (25 [83.3%] of 30) in the 5th phase (delay, 23.4 s) where the gap in contrast enhancement between the renal artery and cortex was the largest. This was followed by the 6th (23 [76.7%] of 30), 4th (22 [73.3%] of 30]), and 7th (21 [70.0%] of 30) phases. The overall rate of depicting feeding arteries in the 11 phases of 4D-CTA was 28 (93.3%) of 30. CONCLUSIONS: The depiction rate of CCRCC feeding arteries including lobar or smaller artery branches by 4D-CTA was favorable. The feeding arteries were optimally visualized during the phase with the largest contrast gap between the renal artery and cortex.

DOI： 10.1007/s11604-024-01538-y

PubMed

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Arterial embolization via retrograde approach using steerable microcatheter and triaxial system Reviewed

Takahiro Kawabata, Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Shoma Nagata, Takao Hiraki

Minimally Invasive Therapy & Allied Technologies 1 - 3 2024.1

Omental Abscess after Laparoscopic Proximal Gastrectomy Successfully Treated with Percutaneous Drainage. Reviewed

Atsunobu Sakurai, Mayu Uka, Toshihiro Iguchi, Koji Tomita, Yusuke Matsui, Yoshihiko Kakiuchi, Shinji Kuroda, Toshiyoshi Fujiwara, Takao Hiraki

Acta medica Okayama 77 ( 6 ) 665 - 669 2023.12

Language：English

We report the case details of a 65-year-old Japanese man with an omental abscess that was discovered 43 days after he underwent a laparoscopic proximal gastrectomy for gastric cancer. His chief complaint was mild abdominal pain that had persisted for several days. The abscess was diagnosed as a rare postoperative complication. We hesitated to perform a reoperation given the invasiveness of general anesthesia and surgery, plus the possibility of postoperative adhesions and because the patient's general condition was stable and he had only mild abdominal pain. Percutaneous drainage using a 10.2-F catheter was performed with the patient under conscious sedation and computed tomography-fluoroscopy guidance, with no complications. After the procedure, the size of the abscess cavity was remarkably reduced, and 23 days later the catheter was withdrawn.

DOI： 10.18926/AMO/66160

PubMed

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Automated Feeder-Detection Software for Renal Cell Carcinoma Embolization: A Retrospective Evaluation of Detection Rate Using Transarterial Time-Resolved Computed Tomography Angiography Reviewed

Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Shoma Nagata, Akira Kurozumi, Ayako Ujifuku, Toshihiro Iguchi, Takao Hiraki

CardioVascular and Interventional Radiology 2023.11

Revolutionizing radiation therapy: the role of AI in clinical practice Reviewed

Mariko Kawamura, Takeshi Kamomae, Masahiro Yanagawa, Koji Kamagata, Shohei Fujita, Daiju Ueda, Yusuke Matsui, Yasutaka Fushimi, Tomoyuki Fujioka, Taiki Nozaki, Akira Yamada, Kenji Hirata, Rintaro Ito, Noriyuki Fujima, Fuminari Tatsugami, Takeshi Nakaura, Takahiro Tsuboyama, Shinji Naganawa

Journal of Radiation Research 2023.11

Publishing type：Research paper (scientific journal) Publisher：Oxford University Press (OUP)

Abstract

This review provides an overview of the application of artificial intelligence (AI) in radiation therapy (RT) from a radiation oncologist’s perspective. Over the years, advances in diagnostic imaging have significantly improved the efficiency and effectiveness of radiotherapy. The introduction of AI has further optimized the segmentation of tumors and organs at risk, thereby saving considerable time for radiation oncologists. AI has also been utilized in treatment planning and optimization, reducing the planning time from several days to minutes or even seconds. Knowledge-based treatment planning and deep learning techniques have been employed to produce treatment plans comparable to those generated by humans. Additionally, AI has potential applications in quality control and assurance of treatment plans, optimization of image-guided RT and monitoring of mobile tumors during treatment. Prognostic evaluation and prediction using AI have been increasingly explored, with radiomics being a prominent area of research. The future of AI in radiation oncology offers the potential to establish treatment standardization by minimizing inter-observer differences in segmentation and improving dose adequacy evaluation. RT standardization through AI may have global implications, providing world-standard treatment even in resource-limited settings. However, there are challenges in accumulating big data, including patient background information and correlating treatment plans with disease outcomes. Although challenges remain, ongoing research and the integration of AI technology hold promise for further advancements in radiation oncology.

DOI： 10.1093/jrr/rrad090

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Time course of complications after small renal mass biopsy: evaluation of initial follow-up images Reviewed

Soichiro Kajita, Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Takao Hiraki

Japanese Journal of Radiology 2023.11

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Purpose

To retrospectively assess the time course of complications after image-guided small renal mass biopsy using initial follow-up imaging.

Materials and methods

A total of 190 masses (mean, 2.1 ± 0.70 cm; range, 0.6–3.8 cm) were assessed using initial computed tomography (43 non-enhanced and 141 enhanced) or magnetic resonance imaging (five non-enhanced and one enhanced) after biopsy. Initial follow-up imaging was classified into two groups (i.e., with or without hematoma) and various factors were compared.

Results

The masses were histologically diagnosed in all patients except one. Post-procedural complications included 129 Grade I hematomas, 1 Grade I hemothorax, 9 Grade II hematomas, and 1 Grade IIIa pneumothorax. Residual 28 Grade I and 6 Grade II hematomas and 8 new complications (6 small hematomas, 1 pseudoaneurysm, and 1 arteriovenous fistula) were observed on the initial follow-up imaging obtained at a median of 21 days (3–90 days) after the biopsy. On the initial follow-up imaging, the groups with and without hematoma differed significantly in the following factors: age (P = 0.04), size (P = 0.02), guided images (P < 0.01), hematoma at the end of the procedure (P < 0.01), and days after biopsy (P < 0.01). Although three masses exhibited > 25% shrinkage, no significant change was observed in mass diameter on initial follow-up imaging (mean, 2.1 ± 0.71 cm; P = 0.90).

Conclusion

Initial follow-up imaging after a biopsy revealed improvements in most of the complications, a few new complications, and an unchanged mass diameter.

DOI： 10.1007/s11604-023-01509-9

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Other Link： https://link.springer.com/article/10.1007/s11604-023-01509-9/fulltext.html

Prospective evaluation of core number of biopsy for renal tumor: are multiple cores preferable? Reviewed

Toshihiro Iguchi, Yusuke Matsui, Tomohiro Toji, Jun Sakurai, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Toshiharu Mitsuhashi, Takao Hiraki

Japanese Journal of Radiology 2023.10

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Purpose

This single-center, single-arm, prospective, open-label study was conducted to evaluate the optimal number of cores (single or multiple) in renal tumor biopsy.

Materials and methods

Forty-four biopsies of 44 tumors (mean diameter, 2.7 ± 1.0 cm; range, 1.6–5.0 cm) were included. Biopsy was performed under ultrasound or computed tomography fluoroscopy guidance using an 18-gauge cutting needle and the co-axial method. Two or more specimens were obtained, which were divided into first and subsequent specimens. “First specimen” and “all specimens” were histologically evaluated (i.e., appropriateness of specimen, histological diagnosis, subtype, and Fuhrman grade of renal cell carcinoma [RCC]) blindly and independently by two board-certified pathologists.

Results

Multiple specimens were successfully and safely obtained in all the biopsies. All tumors were histologically diagnosed; 40 malignancies included 39 RCCs and 1 solitary fibrous tumor, and 4 benign lesions included 2 angiomyolipomas, 1 oncocytoma, and 1 capillary hemangioma. In all RCCs, the subtype could be determined (32 clear cell RCCs, 4 chromophobe RCCs, and 3 papillary RCCs), and the Furman grade was determined in 38 RCCs. When only the first specimen was evaluated, 22.7% of the specimens were inappropriate for diagnosis, and 34 (77.3%) were histologically diagnosed. The diagnostic yield was significantly lower than that of all specimens (P = 0.0044). Univariate analysis revealed that smaller lesions were a significant predictor of diagnostic failure (P = 0.020).

Conclusion

Biopsy with multiple cores significantly improved diagnostic yield. Thus, operators should obtain multiple cores during renal tumor biopsy.

DOI： 10.1007/s11604-023-01496-x

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Other Link： https://link.springer.com/article/10.1007/s11604-023-01496-x/fulltext.html

From FDG and beyond: the evolving potential of nuclear medicine Reviewed

Kenji Hirata, Koji Kamagata, Daiju Ueda, Masahiro Yanagawa, Mariko Kawamura, Takeshi Nakaura, Rintaro Ito, Fuminari Tatsugami, Yusuke Matsui, Akira Yamada, Yasutaka Fushimi, Taiki Nozaki, Shohei Fujita, Tomoyuki Fujioka, Takahiro Tsuboyama, Noriyuki Fujima, Shinji Naganawa

Annals of Nuclear Medicine 2023.9

New trend in artificial intelligence-based assistive technology for thoracic imaging Reviewed

Masahiro Yanagawa, Rintaro Ito, Taiki Nozaki, Tomoyuki Fujioka, Akira Yamada, Shohei Fujita, Koji Kamagata, Yasutaka Fushimi, Takahiro Tsuboyama, Yusuke Matsui, Fuminari Tatsugami, Mariko Kawamura, Daiju Ueda, Noriyuki Fujima, Takeshi Nakaura, Kenji Hirata, Shinji Naganawa

La radiologia medica 2023.8

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Although there is no solid agreement for artificial intelligence (AI), it refers to a computer system with intelligence similar to that of humans. Deep learning appeared in 2006, and more than 10 years have passed since the third AI boom was triggered by improvements in computing power, algorithm development, and the use of big data. In recent years, the application and development of AI technology in the medical field have intensified internationally. There is no doubt that AI will be used in clinical practice to assist in diagnostic imaging in the future. In qualitative diagnosis, it is desirable to develop an explainable AI that at least represents the basis of the diagnostic process. However, it must be kept in mind that AI is a physician-assistant system, and the final decision should be made by the physician while understanding the limitations of AI. The aim of this article is to review the application of AI technology in diagnostic imaging from PubMed database while particularly focusing on diagnostic imaging in thorax such as lesion detection and qualitative diagnosis in order to help radiologists and clinicians to become more familiar with AI in thorax.

DOI： 10.1007/s11547-023-01691-w

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Evaluation of the ear ossicles with photon-counting detector CT Reviewed

Yuka Takahashi, Fumiyo Higaki, Akiko Sugaya, Yudai Asano, Katsuhide Kojima, Yusuke Morimitsu, Noriaki Akagi, Toshihide Itoh, Yusuke Matsui, Takao Hiraki

Japanese Journal of Radiology 2023.8

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Recently, computed tomography with photon-counting detector (PCD-CT) has been developed to enable high-resolution imaging at a lower radiation dose. PCD-CT employs a photon-counting detector that can measure the number of incident X-ray photons and their energy. The newly released PCD-CT (NAEOTOM Alpha, Siemens Healthineers, Forchheim, Germany) has been in clinical use at our institution since December 2022. The PCD-CT offers several advantages over current state-of-the-art energy-integrating detector CT (EID-CT). The PCD-CT does not require septa to create a detector channel, while EID-CT does. Therefore, downsizing the anode to achieve higher resolution does not affect the dose efficiency of the PCD-CT. CT is an indispensable modality for evaluating ear ossicles. The ear ossicles and joints are clearly depicted by PCD-CT. In particular, the anterior and posterior legs of the stapes, which are sometimes unclear on conventional CT scans, can be clearly visualized. We present cases of congenital anomalies of the ossicular chain, ossicular chain dislocation, tympanosclerosis, and cholesteatoma in which PCD-CT was useful. This short article reports the usefulness of PCD-CT in the 3D visualization of the ear ossicles.

DOI： 10.1007/s11604-023-01485-0

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Fairness of artificial intelligence in healthcare: review and recommendations Reviewed

Daiju Ueda, Taichi Kakinuma, Shohei Fujita, Koji Kamagata, Yasutaka Fushimi, Rintaro Ito, Yusuke Matsui, Taiki Nozaki, Takeshi Nakaura, Noriyuki Fujima, Fuminari Tatsugami, Masahiro Yanagawa, Kenji Hirata, Akira Yamada, Takahiro Tsuboyama, Mariko Kawamura, Tomoyuki Fujioka, Shinji Naganawa

Japanese Journal of Radiology 2023.8

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

In this review, we address the issue of fairness in the clinical integration of artificial intelligence (AI) in the medical field. As the clinical adoption of deep learning algorithms, a subfield of AI, progresses, concerns have arisen regarding the impact of AI biases and discrimination on patient health. This review aims to provide a comprehensive overview of concerns associated with AI fairness; discuss strategies to mitigate AI biases; and emphasize the need for cooperation among physicians, AI researchers, AI developers, policymakers, and patients to ensure equitable AI integration. First, we define and introduce the concept of fairness in AI applications in healthcare and radiology, emphasizing the benefits and challenges of incorporating AI into clinical practice. Next, we delve into concerns regarding fairness in healthcare, addressing the various causes of biases in AI and potential concerns such as misdiagnosis, unequal access to treatment, and ethical considerations. We then outline strategies for addressing fairness, such as the importance of diverse and representative data and algorithm audits. Additionally, we discuss ethical and legal considerations such as data privacy, responsibility, accountability, transparency, and explainability in AI. Finally, we present the Fairness of Artificial Intelligence Recommendations in healthcare (FAIR) statement to offer best practices. Through these efforts, we aim to provide a foundation for discussing the responsible and equitable implementation and deployment of AI in healthcare.

DOI： 10.1007/s11604-023-01474-3

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A Case of Small Bowel Arteriovenous Malformation Diagnosed Using Multiphase CT Angiography and Digital Subtraction Angiography Reviewed

Soichiro Okamoto, Yusuke Matsui, Hiroyuki Sakae, Keiichiro Oshima, Takao Hiraki

Cureus 2023.7

Image-Guided Ablation Therapies for Extrahepatic Metastases from Hepatocellular Carcinoma: A Review Invited Reviewed

Noriyuki Umakoshi, Yusuke Matsui, Koji Tomita, Mayu Uka, Takahiro Kawabata, Toshihiro Iguchi, Takao Hiraki

Cancers 15 ( 14 ) 3665 - 3665 2023.7

Publishing type：Research paper (scientific journal) Publisher：MDPI AG

The most common sites of extrahepatic metastases from hepatocellular carcinoma (HCC) are the lungs, intra-abdominal lymph nodes, bones, and adrenal glands, in that order. Although systemic therapies are a common treatment for patients with extrahepatic metastases, local ablative therapies for the extrahepatic metastatic lesions can be performed in selected patients. In this article, the literature on image-guided thermal ablation for metastasis to each organ was reviewed to summarize the current evidence. Radiofrequency ablation was the most commonly evaluated technique, and microwave ablation, cryoablation, and percutaneous ethanol injection were also utilized. The local control rate of thermal ablation therapy was relatively favorable, at approximately 70–90% in various organs. The survival outcomes varied among the studies, and several studies reported that the absence of viable intrahepatic lesions was associated with improved survival rates. Since only retrospective data from relatively small studies has been available thus far, more robust studies with prospective designs and larger cohorts are desired to prove the usefulness of thermal ablation for extrahepatic metastases from HCC.

DOI： 10.3390/cancers15143665

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Recent advances in artificial intelligence for cardiac CT: Enhancing diagnosis and prognosis prediction Reviewed

Fuminari Tatsugami, Takeshi Nakaura, Masahiro Yanagawa, Shohei Fujita, Koji Kamagata, Rintaro Ito, Mariko Kawamura, Yasutaka Fushimi, Daiju Ueda, Yusuke Matsui, Akira Yamada, Noriyuki Fujima, Tomoyuki Fujioka, Taiki Nozaki, Takahiro Tsuboyama, Kenji Hirata, Shinji Naganawa

Diagnostic and Interventional Imaging 2023.7

Clinical applications of artificial intelligence in liver imaging. Reviewed

Akira Yamada, Kamagata K, Hirata K, Ito R, Nakaura T, Ueda D, Fujita S, Fushimi Y, Fujima N, Matsui Y, Tatsugami F, Nozaki T, Fujioka T, Yanagawa M, Tsuboyama T, Kawamura M, Naganawa S

La Radiologia medica 2023.5

Publishing type：Research paper (scientific journal)

This review outlines the current status and challenges of the clinical applications of artificial intelligence in liver imaging using computed tomography or magnetic resonance imaging based on a topic analysis of PubMed search results using latent Dirichlet allocation. LDA revealed that "segmentation," "hepatocellular carcinoma and radiomics," "metastasis," "fibrosis," and "reconstruction" were current main topic keywords. Automatic liver segmentation technology using deep learning is beginning to assume new clinical significance as part of whole-body composition analysis. It has also been applied to the screening of large populations and the acquisition of training data for machine learning models and has resulted in the development of imaging biomarkers that have a significant impact on important clinical issues, such as the estimation of liver fibrosis, recurrence, and prognosis of malignant tumors. Deep learning reconstruction is expanding as a new technological clinical application of artificial intelligence and has shown results in reducing contrast and radiation doses. However, there is much missing evidence, such as external validation of machine learning models and the evaluation of the diagnostic performance of specific diseases using deep learning reconstruction, suggesting that the clinical application of these technologies is still in development.

DOI： 10.1007/s11547-023-01638-1

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Robotic systems in interventional oncology: a narrative review of the current status Invited Reviewed

Yusuke Matsui, Tetsushi Kamegawa, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Toshihiro Iguchi, Takayuki Matsuno, Takao Hiraki

International Journal of Clinical Oncology 2023.4

Renal cryoablation combined with prior transcatheter arterial embolization in non-dialysis patients with stage 4 or 5 chronic kidney disease: a retrospective study Reviewed

Noriyuki Umakoshi, Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Takahiro Kawabata, Kazuaki Munetomo, Shoma Nagata, Hideo Gobara, Motoo Araki, Takao Hiraki

Japanese Journal of Radiology 2023.4

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Purpose

To retrospectively evaluate cryoablation combined with prior transcatheter arterial embolization (TAE) for renal cell carcinoma (RCC) in non-dialysis patients with stage 4 or 5 chronic kidney disease (CKD).

Materials and methods

Patients with stage 4 or 5 CKD undergoing TAE and cryoablation for RCC between May 2012 and October 2021 were included. TAE was selectively performed using iodized oil with absolute ethanol or gelatin sponge 1–14 days before cryoablation. Local efficacy, safety, and changes in renal function were evaluated.

Results

Nine patients (seven men and two women; median age, 64 years; range 52–88 years) with nine RCCs (mean diameter, 3.0 ± 1.0 cm; range 1.7–4.7 cm) were included. The mean pre-treatment estimated glomerular filtration rate (eGFR) was 24.2 ± 5.6 ml/min/1.73 m² (range 10.4–29.2 ml/min/1.73 m²). The mean amount of contrast medium used in TAE was 58 ± 29 ml (range 40–128 ml). Except in one patient (grade 3 pyelonephritis), no grade ≥ 3 complications occurred. During the follow-up period (median, 18 months; range 7–54 months), no local tumor progression occurred. In two patients with pre-treatment eGFR of < 20 ml/min/1.73 m², hemodialysis was initiated at 3 and 19 months after cryoablation. At their last follow-up, the remaining seven patients showed a decrease of 6.2 ± 5.3 ml/min/1.73 m² (range 0.7–17.2 ml/min/1.73 m²) in their eGFR.

Conclusion

Cryoablation combined with TAE for RCC in non-dialysis patients with stage 4 or 5 CKD was effective and safe, with an acceptable impact on renal function.

DOI： 10.1007/s11604-023-01416-z

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Complications of Percutaneous Cryoablation for Renal Tumors and Methods for Avoiding Them. Reviewed

Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Shoma Nagata, Motoo Araki, Takao Hiraki

Acta medica Okayama 77 ( 2 ) 121 - 129 2023.4

Language：English Publishing type：Research paper (scientific journal)

Percutaneous cryoablation of renal tumors is widely used because of its high efficacy and safety. This high safety can be attributed, at least in part, to the visibility of the ablated area as an "ice ball". This therapy has fewer complications (incidence, 0-7.2%) and is less invasive than surgery. Minor bleeding is inevitable in most kidney-related procedures, and indeed the most common complication of this therapy is bleeding (hematoma and hematuria). However, patients require treatment such as transfusion or transarterial embolization in only 0-4% of bleeding cases. Various other complications such as ureteral or collecting system injury, bowel injury, nerve injury, skin injury, infection, pneumothorax, and tract seeding also occur, but they are usually minor and asymptomatic. However, operators should know and avoid the various complications associated with this therapy. This study aimed to summarize the complications of percutaneous cryoablation for renal tumors and provide some techniques for achieving safe procedures.

DOI： 10.18926/AMO/65141

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Navicular Bone Fracture after Radiofrequency Ablation in a Patient with Osteoid Osteoma. Reviewed

Koji Tomita, Toshihiro Iguchi, Yusuke Matsui, Mayu Uka, Eiji Nakata, Takao Hiraki

Acta medica Okayama 77 ( 1 ) 81 - 84 2023.2

Language：English

Osteoid osteoma (OO) is a benign bone tumor that presents with nocturnal pain. Computed tomography (CT)- guided radiofrequency ablation (RFA) has been widely performed for OO, and major adverse events post-RFA are rare. We report a case of OO in the left navicular bone of a 15-year-old male. He underwent RFA for OO, and the pain improved temporarily. At the 1-month follow-up, the patient complained of left foot pain, and a CT examination revealed a fracture of the ablated navicular bone. Fractures are rare but must be taken into account after bone RFA.

DOI： 10.18926/AMO/64366

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Current State of Artificial Intelligence in Clinical Applications for Head and Neck MR Imaging Reviewed

Noriyuki Fujima, Koji Kamagata, Daiju Ueda, Shohei Fujita, Yasutaka Fushimi, Masahiro Yanagawa, Rintaro Ito, Takahiro Tsuboyama, Mariko Kawamura, Takeshi Nakaura, Akira Yamada, Taiki Nozaki, Tomoyuki Fujioka, Yusuke Matsui, Kenji Hirata, Fuminari Tatsugami, Shinji Naganawa

Magnetic Resonance in Medical Sciences 2023

Magnetic Resonance Imaging Guidance for Percutaneous Needle Intervention Invited Reviewed

Mayu Uka, Yusuke Matsui, Toshihiro Iguchi, Toshi Matsushita, Koji Tomita, Noriyuki Umakoshi, Takahiro Kawabata, Masanori Yamada, Takao Hiraki

Interventional Radiology 2023

Is ChatGPT a “Fire of Prometheus” for Non-Native English-Speaking Researchers in Academic Writing? Reviewed

Sung Il Hwang, Joon Seo Lim, Ro Woon Lee, Yusuke Matsui, Toshihiro Iguchi, Takao Hiraki, Hyungwoo Ahn

Korean Journal of Radiology 24 ( 10 ) 952 - 952 2023

Early enlarging cavitation after percutaneous radiofrequency ablation of lung tumors: Incidence, risk factors and outcome Reviewed

Koji Tomita, Toshihiro Iguchi, Yusuke Matsui, Mayu Uka, Noriyuki Umakoshi, Toshiharu Mitsuhashi, Jun Sakurai, Hideo Gobara, Susumu Kanazawa, Takao Hiraki

Diagnostic and Interventional Imaging 103 ( 10 ) 464 - 471 2022.10

Evidence on percutaneous radiofrequency and microwave ablation for liver metastases over the last decade Invited Reviewed

Koji Tomita, Yusuke Matsui, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Shoma Nagata, Toshihiro Iguchi, Takao Hiraki

Japanese Journal of Radiology 2022.9

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Purpose

This review aimed to summarize the treatment outcomes of percutaneous radiofrequency ablation (RFA) and microwave ablation (MWA) for metastatic liver tumors based on the findings of published studies over the last decade.

Materials and methods

Literature describing the survival outcomes of ablation therapy for liver metastases was explored using the PubMed database on April 26, 2022, and articles published in 2012 or later were selected. The included studies met the following criteria: (i) English literature, (ii) original clinical studies, and (iii) literature describing overall survival (OS) of thermal ablation for metastatic liver tumors. All case reports and cohort studies with fewer than 20 patients and those that evaluated ablation for palliative purposes were excluded.

Results

RFA was the most commonly used method for ablation, while MWA was used in several recent studies. RFA and MWA for liver metastases from various primary tumors have been reported; however, majority of the studies focused on colorectal cancer. The local control rate by RFA and MWA varied widely among the studies, ranging approximately 50–90%. Five-year survival rates of 20–60% have been reported following ablation for colorectal liver metastases by a number of studies, and several reports of 10-year survival rates were also noted.

Conclusion

Comparative studies of local therapies for colorectal liver metastases demonstrated that RFA provides comparable survival outcomes to surgical metastasectomy and stereotactic body radiation therapy.

DOI： 10.1007/s11604-022-01335-5

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Percutaneous cryoablation combined with prior transcatheter arterial embolization for renal cell carcinomas of 3 cm or larger: a prospective study Reviewed

Hideo Gobara, Yusuke Matsui, Mayu Uka, Koji Tomita, Noriyuki Umakoshi, Motoo Araki, Jun Sakurai, Toshihiro Iguchi, Takao Hiraki

International Journal of Clinical Oncology 2022.8

Overcoming cold-sink effect of blood flow during thermal ablation of central renal cancer Invited Reviewed

Toshihiro Iguchi, Yusuke Matsui, Takao Hiraki

Diagnostic and Interventional Imaging 2022.8

Up-to-date evidence on image-guided thermal ablation for metastatic lung tumors: a review Invited Reviewed

Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Takahiro Kawabata, Kazuaki Munetomo, Shoma Nagata, Toshihiro Iguchi, Takao Hiraki

Japanese Journal of Radiology 2022.7

Authorship：Lead author,　Corresponding author Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

The aim of this review was to summarize the latest evidence on image-guided thermal ablation therapies for lung metastases. PubMed was used to search for relevant articles that reported the oncological outcomes of thermal ablation for metastatic lung tumors, and those published in 2010 or later were selected for review. Ablative therapies were applied for lung metastases from various types of primary tumors, but most commonly colorectal ones. Radiofrequency ablation (RFA) was the most evaluated technique, followed by microwave ablation (MWA). The local control rates of ablative therapies were generally favorable, approximately 80–90% in many studies. Representative studies demonstrated promising overall survival rates of approximately 50% or higher 5 years after ablation for lung metastases from colorectal cancer or mixed types of primary tumors. Nevertheless, the survival outcomes varied depending on the type of primary tumor and background factors of patients such as other metastases and comorbidities. Several studies had aimed to compare the outcomes of various ablative therapies such as RFA, MWA, and cryoablation; however, conclusive data are not yet available to determine the most appropriate ablation modality for lung metastases. Further data accumulation is needed, especially for long-term outcomes and comparisons with other therapies.

DOI： 10.1007/s11604-022-01302-0

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Percutaneous cryoablation for clinical T3a renal cell carcinoma (< 7 cm) with segmental vein involvement or perinephric fat invasion based on preoperative evaluation of high-resolution multidetector computed tomography scan Reviewed

Mayu Uka, Toshihiro Iguchi, Nanako Okawa, Yusuke Matsui, Koji Tomita, Noriyuki Umakoshi, Kazuaki Munetomo, Hideo Gobara, Motoo Araki, Takao Hiraki

Japanese Journal of Radiology 2022.6

Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

Abstract

Purpose

To retrospectively assess the feasibility, safety, renal function, technique efficacy rate, and survival of patients with clinical T3a renal cell carcinoma (RCC).

Materials and methods

Sixteen cryoablation sessions were performed in 14 patients (10 men; mean age, 69.8 ± 10.5 years; range, 49–90 years) with 14 clear cell T3a RCCs (mean, 3.3 ± 0.9 cm; range, 1.9–5.2 cm). One patient was on dialysis. Transcatheter arterial embolization was performed before cryoablation in 15 sessions. The primary endpoint was the technique efficacy rate. The secondary endpoints included feasibility, safety, renal function, and survival.

Results

Cryoablation was technically successful in all RCC cases. In two RCCs, cryoablation was performed twice because of local tumor progression. No major adverse events were observed. All patients were alive without metastases, with a median follow-up of 45 months (6−93 months). Complete response was achieved by cryoablation in 11 RCCs (78.6%). The primary and secondary technique efficacy rates were 77.1% and 84.4% at 1 year, 57.9% and 73.9% at 3 years, and 57.9% and 73.9% at 5 years, respectively. One patient underwent dialysis given a total contralateral nephrectomy due to another RCC 1 month after initial cryoablation and a total ipsilateral nephrectomy 46 months after initial cryoablation due to local progression. Except for two dialysis patients, of the 12 patients with a median follow-up of 41 months (6–93 months), none were on dialysis.

Conclusion

Cryoablation was safe and effective in T3a RCC, which mainly involved the renal venous branches and may represent an alternative treatment for inoperable patients.

DOI： 10.1007/s11604-022-01297-8

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Correlation between renal ablation zone in contrast-enhanced CT and non-enhanced MRI during the early period following percutaneous cryoablation. Reviewed

Noriyuki Umakoshi, Toshihiro Iguchi, Takao Hiraki, Yusuke Matsui, Koji Tomita, Mayu Uka, Soichiro Kajita, Motoo Araki, Toshiharu Mitsuhashi, Hideo Gobara, Susumu Kanazawa

Japanese journal of radiology 2022.5

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: To retrospectively evaluate and correlate the contrast-enhanced computed tomography (CECT) and non-enhanced magnetic resonance imaging (MRI) during the early period following renal cryoablation. MATERIALS AND METHODS: Both dynamic CECT and non-enhanced MRI were performed within 4 days following cryoablation in 34 renal tumors in 33 patients. The renal volumes of the unenhanced regions on dynamic CECT (nephrogenic phase, 4 mm thickness) and the regions with signal intensity changes on non-enhanced MRI (fat-suppressed T2-weighted image, 4 mm thickness) were evaluated. Fusion images of the axial, coronal, and sagittal sections of CECT and MRI images were created from the maximum cross-section of the renal tumor, and the match score of each image was visually evaluated on a 5-point scale. RESULTS: The mean renal volume of the unenhanced regions on CECT and those with signal intensity changes on non-enhanced MRI following cryoablation were 29.5 ± 19.9 cm3 (range, 4.3-97.4 cm3) and 30.7 ± 19.8 cm3 (range, 6.7-94.0 cm3), respectively; the difference between them was -1.17 cm3 (95% confidence interval [CI] -2.74, 0.40, P = 0.139). The Pearson's product-moment correlation coefficient (r = 0.975; 95% CI, 0.951, 0.988; P < 0.0001) showed a strong correlation between the volumes. The average match score between CECT and non-enhanced MRI was as high as 4.5 ± 0.5 points (radiologist 1, 4.3 ± 0.5; radiologist 2, 4.7 ± 0.5). Local tumor control rate was 94.1% (32/34 tumors) and recurrence-free survival rate was 82.0% (95% CI: 64.2%, 91.5%) at 5 years. CONCLUSIONS: The region with signal intensity changes on non-enhanced MRI was strongly correlated with the unenhanced region on CECT during the early period following renal cryoablation.

DOI： 10.1007/s11604-022-01285-y

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Two Cases of Duodenal Ulcers That Developed after Transcatheter Procedures for Unruptured Visceral Artery Aneurysms Reviewed

Masaya Iwamuro, Yusuke Kawai, Mayu Uka, Yusuke Matsui, Takao Hiraki, Yoshiro Kawahara, Hiroyuki Okada

Case Reports in Gastrointestinal Medicine 2022 1 - 6 2022.4

Publishing type：Research paper (scientific journal) Publisher：Hindawi Limited

Herein, we report two cases of duodenal ulcers that developed after transcatheter procedures for the treatment of unruptured artery aneurysms. Both patients recovered after the administration of nothing by mouth, intravenous fluids, and proton-pump inhibitors. Notably, the duodenal ulcer was unchanged in one patient six days after endovascular treatment and improved in the other patient 13 days after angiography. These cases suggest that conservative treatment is acceptable in patients with duodenal ischemia that develops as an adverse effect of endovascular procedures. The usefulness of esophagogastroduodenoscopy in such patients has also been highlighted.

DOI： 10.1155/2022/9988216

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CT fluoroscopy-guided biopsy of pulmonary lesions contacting the interlobar fissure: An analysis of 72 biopsies Reviewed

Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Noriyuki Umakoshi, Kazuaki Munetomo, Takao Hiraki

Diagnostic and Interventional Imaging 2022.2

In Vivo Microwave Ablation of Normal Swine Lung at High-power, Short-duration Settings. Reviewed

Toshihiro Iguchi, Takao Hiraki, Yusuke Matsui, Tomohiro Toji, Mayu Uka, Koji Tomita, Toshiyuki Komaki, Noriyuki Umakoshi, Toshiharu Mitsuhashi, Susumu Kanazawa

Acta medica Okayama 76 ( 1 ) 57 - 62 2022.2

Language：English Publishing type：Research paper (scientific journal)

To evaluate the volume and heat-sink effects of microwave ablation (MWA) in the ablation zone of the normal swine lung. MWA at 100 W was performed for 1, 2, and 3 min in 7, 5, and 5 lung zones, respectively. We assessed the histopathology in the ablation zones and other outcome measures: namely, length of the longest long and short axes, sphericity, ellipsoid area, and ellipsoid volume. The mean long- and short-axis diameters were 22.0 and 14.1 mm in the 1-min ablation zone, 27.6 and 20.2 mm in the 2-min ablation zone; and 29.2 and 21.2 mm in the 3-min ablation zone, respectively. All measures, except sphericity, were significantly less with 1-min ablation than with either 2- or 3-min ablation. There were no significant differences between the 2- and 3-min ablation zones, but all measures except sphericity were larger with 3-min ablation. Although there were no blood vessels that resulted in a heat-sink effect within the ablation zones, the presence of bronchi nearby in 5 lung ablation zones resulted in reduced ablation size. In high-power, short-duration MWA, the lung ablation volume was affected by ablation time. Some ablations showed that a heat-sink effect by a neighboring bronchus might occur.

DOI： 10.18926/AMO/63212

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Pneumodissection during percutaneous renal cryoablation resulting in massive subcutaneous and mediastinal emphysema Reviewed

Koji Tomita, Toshihiro Iguchi, Yusuke Matsui, Mayu Uka, Noriyuki Umakoshi, Takao Hiraki

Diagnostic and Interventional Imaging 2022.1

A single-center, single-arm, prospective, open-label trial to evaluate the efficacy and safety of percutaneous sclerotherapy with polidocanol for painful venous malformations (SCIRO-2001): study protocol Reviewed

Uka, Mayu, Sakurai, Jun, Matsui, Yusuke, Iguchi, Toshihiro, Tomita, Koji, Umakoshi, Noriyuki, Munetomo, Kazuaki, Mitsuhashi, Toshiharu, Gobara, Hideo, Hiraki, Takao

84 ( 4 ) 746 - 751 2022

CT evaluation of patent artery after percutaneous cryoablation of renal cell carcinoma Reviewed

Soichiro Kajita, Toshihiro Iguchi, Takao Hiraki, Yusuke Matsui, Koji Tomita, Mayu Uka, Takashi Tanaka, Motoo Araki, Hideo Gobara, Susumu Kanazawa

Diagnostic and Interventional Imaging 102 ( 12 ) 753 - 758 2021.12

Catecholamine crisis due to cryoinjury of adrenal gland during renal cryoablation Reviewed

Kazuaki Munetomo, Yusuke Matsui, Toshihiro Iguchi, Koji Tomita, Mayu Uka, Hideo Gobara, Takao Hiraki

Journal of Vascular and Interventional Radiology 2021.12

Percutaneous needle biopsy under 1.2 Tesla open MRI guidance Reviewed

Yusuke Matsui, Takao Hiraki, Jun Sakurai, Soichiro Okamoto, Toshihiro Iguchi, Koji Tomita, Mayu Uka, Takatsugu Yamauchi, Hideo Gobara, Susumu Kanazawa

Japanese Journal of Radiology 2021.11

Authorship：Lead author,　Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

DOI： 10.1007/s11604-021-01211-8

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Computed Tomography-guided Core Needle Biopsy for Renal Tumors: A Review Reviewed

Toshihiro Iguchi, Yusuke Matsui, Koji Tomita, Mayu Uka, Toshiyuki Komaki, Soichiro Kajita, Noriyuki Umakoshi, Kazuaki Munetomo, Hideo Gobara, Susumu Kanazawa

Interventional Radiology 6 ( 3 ) 69 - 74 2021.11

CT-guided biopsy of lung nodules with pleural contact: Comparison of two puncture routes Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Tomita, Koji, Uka, Mayu, Tanaka, Takashi, Munetomo, Kazuaki, Gobara, Hideo, Kanazawa, Susumu

Diagnostic and Interventional Imaging 102 ( 9 ) 539 - 544 2021.9

Percutaneous Cryoablation of Lower Limb Soft-Tissue Venous Malformations: Preliminary Results of Long-Term Efficacy Reviewed

Fujiwara, Hiroyasu, Hiraki, Takao, Matsui, Yusuke, Uka, Mayu, Tomita, Koji, Iguchi, Toshihiro, Sakurai, Jun, Soshi, Takao, Gobara, Hideo, Kanazawa, Susumu

CardioVascular and Interventional Radiology 44 ( 9 ) 1485 - 1490 2021.9

Location of embolization affects patency after coil embolization for pulmonary arteriovenous malformations: importance of time-resolved magnetic resonance angiography for diagnosis of patency Reviewed

Shimohira, Masashi, Kiyosue, Hiro, Osuga, Keigo, Gobara, Hideo, Kondo, Hiroshi, Nakazawa, Tetsuro, Matsui, Yusuke, Hamamoto, Kohei, Ishiguro, Tomoya, Maruno, Miyuki, Sugimoto, Koji, Koganemaru, Masamichi, Kitagawa, Akira, Yamakado, Koichiro

European Radiology 31 ( 7 ) 5409 - 5420 2021.7

Needle artifact characteristics and insertion accuracy using a 1.2 T open MRI scanner: A phantom study Reviewed

Okamoto, Soichiro, Matsui, Yusuke, Hiraki, Takao, Iguchi, Toshihiro, Komaki, Toshiyuki, Yamauchi, Takatsugu, Uka, Mayu, Tomita, Koji, Sakurai, Jun, Gobara, Hideo, Kanazawa, Susumu

Diagnostic and Interventional Imaging 102 ( 6 ) 363 - 370 2021.6

Contrast examination of central venous access port implanted through internal jugular vein for evaluation of suspected complications Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Tomita, Koji, Uka, Mayu, Umakoshi, Noriyuki, Kajita, Soichiro, Komaki, Toshiyuki, Gobara, Hideo, Kanazawa, Susumu

Japanese Journal of Radiology ( 0123456789 ) 2021.5

Oncologic outcomes and safety of percutaneous cryoablation for biopsy-proven renal cell carcinoma up to 4 cm in diameter: a prospective observational study Reviewed

Gobara, Hideo, Hiraki, Takao, Iguchi, Toshihiro, Matsui, Yusuke, Sakurai, Jun, Uka, Mayu, Tomita, Koji, Komaki, Toshiyuki, Kobayasi, Yasuyuki, Araki, Motoo, Watanabe, Toyohiko, Kanazawa, Susumu

International Journal of Clinical Oncology 26 ( 3 ) 562 - 568 2021.3

Lung Laceration Caused by Short Hookwire Placement Before Video-Assisted Thoracoscopic Surgery Reviewed

Munetomo, Kazuaki, Matsui, Yusuke, Iguchi, Toshihiro, Hiraki, Takao, Yamamoto, Hiromasa, Toyooka, Shinichi, Kanazawa, Susumu

CardioVascular and Interventional Radiology 44 ( 2 ) 339 - 341 2021.2

Needle Tract Ablation in Liver Tissue Using a Cryoprobe Combined with an Electrosurgical Device: Influence of ex vivo and in vivo Animal Models. Reviewed

Gobara, Hideo, Yamamoto, Akira, Komaki, Toshiyuki, Kitayama, Toshiaki, Sakurai, Jun, Iguchi, Toshihiro, Matsui, Yusuke, Uka, Mayu, Tomita, Koji, Hiraki, Takao, Kanazawa, Susumu

Acta medica Okayama 75 ( 1 ) 9 - 14 2021.2

Combined Laparoscopic and CT Monitoring of the Ice-Ball Margin during Cryoablation for Renal Cell Carcinoma Associated with von Hippel-Lindau Disease: First Case. Reviewed

Sekito, Takanori, Araki, Motoo, Hiraki, Takao, Uka, Mayu, Komaki, Toshiyuki, Matsui, Yusuke, Iguchi, Toshihiro, Katayama, Satoshi, Yoshinaga, Kasumi, Watari, Shogo, Maruyama, Yuki, Mitsui, Yosuke, Kubota, Risa, Sadahira, Takuya, Nishimura, Shingo, Wada, Koichiro, Takamoto, Atsushi, Edamura, Kohei, Sako, Tomoko, Kobayashi, Yasuyuki, Watanabe, Toyohiko, Kanazawa, Susumu, Nasu, Yasutomo

Acta medica Okayama 74 ( 5 ) 443 - 448 2020.10

Pathological evaluation of radiotherapy and concomitant intraarterial cisplatin for maxillary sinus cancer Reviewed

Makino, Takuma, Tachibana, Tomoyasu, Kariya, Shin, Matsui, Yusuke, Matsuzaki, Hidenobu, Fujimoto, Shohei, Orita, Yorihisa, Katsui, Kuniaki, Hiraki, Takao, Sato, Yasuharu, Kanazawa, Susumu, Nishizaki, Kazunori

Auris Nasus Larynx 47 ( 5 ) 881 - 886 2020.10

Histological findings in non-tumoral liver and tumor after chemoembolization with drug-eluting beads Reviewed

Matsui, Yusuke, Fujiwara, Hiroyasu, Hiraki, Takao, Iguchi, Toshihiro, Komaki, Toshiyuki, Tanaka, Takehiro, Yagi, Takahito, Gobara, Hideo, Kanazawa, Susumu

Minimally Invasive Therapy & Allied Technologies 29 ( 4 ) 217 - 223 2020.7

Survival Outcomes of Treatment with Radiofrequency Ablation, Stereotactic Body Radiotherapy, or Sublobar Resection for Patients with Clinical Stage I Non–Small-Cell Lung Cancer: A Single-Center Evaluation Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Mitsuhashi, Toshiharu, Katayama, Norihisa, Katsui, Kuniaki, Soh, Junichi, Sakurai, Jun, Gobara, Hideo, Toyooka, Shinichi, Kanazawa, Susumu

Journal of Vascular and Interventional Radiology 31 ( 7 ) 1044 - 1051 2020.7

Difference in specimen weights with semi-automatic cutting biopsy needles Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Mitsuhashi, Toshiharu, Komaki, Toshiyuki, Okamoto, Soichiro, Fukuma, Shogo, Tomita, Koji, Uka, Mayu, Kanazawa, Susumu

Japanese Journal of Radiology 38 ( 6 ) 579 - 586 2020.6

A Clinical Study Evaluating an Aspiration-type Semi-Automatic Cutting Biopsy Needle (SCIRO-1702). Reviewed

Matsui, Yusuke, Hiraki, Takao, Iguchi, Toshihiro, Sakurai, Jun, Uka, Mayu, Masaoka, Yoshihisa, Gobara, Hideo, Kanazawa, Susumu

Acta medica Okayama 74 ( 3 ) 209 - 214 2020.6

Treatment of pulmonary arteriovenous malformations: clinical experience using different embolization strategies Reviewed

Adachi, Akira, Ohta, Kengo, Jahangiri, Younes, Matsui, Yusuke, Horikawa, Masahiro, Geeratikun, Yindee, Chansanti, Orapin, Yata, Shinsaku, Fujii, Shinya, Steinberger, Jonathan, Keller, Frederick S., Farsad, Khashayar

Japanese Journal of Radiology 38 ( 4 ) 382 - 386 2020.4

Computed tomography fluoroscopy-guided cutting needle biopsy of pulmonary nodules ≤8 mm: A retrospective study including 117 nodules Reviewed

Zhao, Yanqing, Matsui, Yusuke, Hiraki, Takao, Iguchi, Toshihiro, Tomita, Koji, Uka, Mayu, Gobara, Hideo, Toyooka, Shinichi, Kanazawa, Susumu

European Journal of Radiology 125 ( November 2019 ) 108903 - 108903 2020.4

Robotic CT-guided out-of-plane needle insertion: comparison of angle accuracy with manual insertion in phantom and measurement of distance accuracy in animals Reviewed

Komaki, Toshiyuki, Hiraki, Takao, Kamegawa, Tetsushi, Matsuno, Takayuki, Sakurai, Jun, Matsuura, Ryutaro, Yamaguchi, Takuya, Sasaki, Takanori, Mitsuhashi, Toshiharu, Okamoto, Soichiro, Uka, Mayu, Matsui, Yusuke, Iguchi, Toshihiro, Gobara, Hideo, Kanazawa, Susumu

European Radiology 30 ( 3 ) 1342 - 1349 2020.3

Embolization using hydrogel-coated coils for pulmonary arteriovenous malformations Reviewed

Iguchi, T., Hiraki, T., Matsui, Y., Fujiwara, H., Sakurai, J., Baba, K., Toyooka, S., Gobara, H., Kanazawa, S.

Diagnostic and Interventional Imaging 101 ( 3 ) 129 - 135 2020.3

Robotic needle insertion during computed tomography fluoroscopy-guided biopsy: prospective first-in-human feasibility trial. Reviewed

Hiraki, Takao, Kamegawa, Tetsushi, Matsuno, Takayuki, Sakurai, Jun, Komaki, Toshiyuki, Yamaguchi, Takuya, Tomita, Koji, Uka, Mayu, Matsui, Yusuke, Iguchi, Toshihiro, Gobara, Hideo, Kanazawa, Susumu

European radiology 30 ( 2 ) 927 - 933 2020.2

Six Cases of Radiographic Ice Ball Involvement of the Ureter During Percutaneous Cryoablation for Renal Cancers Reviewed

Zhao, Yanqing, Matsui, Yusuke, Hiraki, Takao, Iguchi, Toshihiro, Masaoka, Yoshihisa, Kanazawa, Susumu

CardioVascular and Interventional Radiology 43 ( 2 ) 344 - 346 2020.2

Post-ablation syndrome after percutaneous cryoablation of small renal tumors: A prospective study of incidence, severity, duration, and effect on lifestyle Reviewed

Kawabata, Takahiro, Hiraki, Takao, Iguchi, Toshihiro, Matsui, Yusuke, Uka, Mayu, Masaoka, Yoshihisa, Komaki, Toshiyuki, Sakurai, Jun, Gobara, Hideo, Araki, Motoo, Nasu, Yasutomo, Kanazawa, Susumu

European Journal of Radiology 122 ( July 2019 ) 108750 - 108750 2020.1

Radiofrequency Ablation for Stage I Non-Small Cell Lung Cancer: An Updated Review of Literature from the Last Decade Invited Reviewed

Matsui, Yusuke, Iguchi, Toshihiro, Tomita, Koji, Uka, Mayu, Sakurai, Jun, Gobara, Hideo, Kanazawa, Susumu

Interventional Radiology 5 ( 2 ) 43 - 49 2020

Hemobilia after bile duct resection: perforation of pseudoaneurysm into intra-pancreatic remnant bile duct: a case report Reviewed

Yoshida, Kazuhiro, Umeda, Yuzo, Iwamuro, Masaya, Matsumoto, Kazuyuki, Kato, Hironari, Uka, Mayu, Matsui, Yusuke, Yoshida, Ryuichi, Kuise, Takashi, Yasui, Kazuya, Takagi, Kosei, Araki, Hiroyuki, Yagi, Takahito, Fujiwara, Toshiyoshi

BMC Surgery 20 ( 1 ) 1 - 4 2020

Image-guided core biopsy of 2-cm or smaller renal tumors Reviewed

Iguchi, T., Hiraki, T., Matsui, Y., Tomita, K., Uka, M., Tanaka, T., Komaki, T., Toji, T., Gobara, H., Kanazawa, S.

Diagnostic and Interventional Imaging 101 ( 11 ) 715 - 720 2020

Computed Tomography Fluoroscopy-guided Core Needle Biopsy of Abdominal Para-aortic Lesions: A Retrospective Evaluation of the Diagnostic Yield and Safety Reviewed

Tomita, Koji, Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Uka, Mayu, Komaki, Toshiyuki, Gobara, Hideo, Kanazawa, Susumu

Interventional Radiology 5 ( 3 ) 128 - 133 2020

Recurring Local Tumor Progression After Cryoablation of Renal Cell Carcinoma

Okamoto, Soichiro, Matsui, Yusuke, Hiraki, Takao, Iguchi, Toshihiro, Tomita, Koji, Uka, Mayu, Gobara, Hideo, Kanazawa, Susumu

Interventional Radiology 5 ( 2 ) 77 - 81 2020

Reversible phrenic nerve injury after radiofrequency ablation of lung tumor Reviewed

Iguchi, T., Hiraki, T., Matsui, Y., Sakurai, J., Kanazawa, S.

Diagnostic and Interventional Imaging 100 ( 11 ) 725 - 727 2019.11

Percutaneous thermal ablation for renal cell carcinoma in patients with Birt–Hogg–Dubé syndrome Reviewed

Matsui, Y., Hiraki, T., Gobara, H., Iguchi, T., Tomita, K., Uka, M., Araki, M., Nasu, Y., Furuya, M., Kanazawa, S.

Diagnostic and Interventional Imaging 100 ( 11 ) 671 - 677 2019.11

MRI-guided percutaneous needle biopsy with 1.2T open MRI: study protocol for a prospective feasibility study (SCIRO-1701). Reviewed

Matsui, Yusuke, Sakurai, Jun, Hiraki, Takao, Okamoto, Soichiro, Iguchi, Toshihiro, Tomita, Koji, Uka, Mayu, Gobara, Hideo, Kanazawa, Susumu

Nagoya journal of medical science 81 ( 3 ) 463 - 468 2019.8

Cryoablation of renal cell carcinoma for patients with stage 4 or 5 non-dialysis chronic kidney disease Reviewed

Gobara, Hideo, Nakatsuka, Atsuhiro, Shimizu, Kanichiro, Yamanaka, Takashi, Matsui, Yusuke, Iguchi, Toshihiro, Hiraki, Takao, Yamakado, Koichiro

Japanese Journal of Radiology 37 ( 6 ) 481 - 486 2019.6

Robotic Insertion of Various Ablation Needles Under Computed Tomography Guidance: Accuracy in Animal Experiments Reviewed

Hiraki, Takao, Matsuno, Takayuki, Kamegawa, Tetsushi, Komaki, Toshiyuki, Sakurai, Jun, Matsuura, Ryutaro, Yamaguchi, Takuya, Sasaki, Takanori, Iguchi, Toshihiro, Matsui, Yusuke, Gobara, Hideo, Kanazawa, Susumu

European Journal of Radiology 105 ( May ) 162 - 167 2018.8

Preoperative short hookwire placement for small pulmonary lesions: evaluation of technical success and risk factors for initial placement failure Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Fujiwara, Hiroyasu, Masaoka, Yoshihisa, Tanaka, Takashi, Sato, Takuya, Gobara, Hideo, Toyooka, Shinichi, Kanazawa, Susumu

European Radiology 28 ( 5 ) 2194 - 2202 2018.5

CT fluoroscopy-guided renal tumour cutting needle biopsy: retrospective evaluation of diagnostic yield, safety, and risk factors for diagnostic failure Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Matsui, Yusuke, Fujiwara, Hiroyasu, Sakurai, Jun, Masaoka, Yoshihisa, Gobara, Hideo, Kanazawa, Susumu

European Radiology 28 ( 1 ) 283 - 290 2018.1

Short hookwire placement under imaging guidance before thoracic surgery: A review Reviewed

Iguchi, T., Hiraki, T., Matsui, Y., Fujiwara, H., Masaoka, Y., Uka, M., Gobara, H., Toyooka, S., Kanazawa, S.

Diagnostic and Interventional Imaging 99 ( 10 ) 591 - 597 2018

Ureteral obstruction by sloughed tumor complicating cryoablation of a renal oncocytoma Reviewed

Okawa, Hiro, Gobara, Hideo, Matsui, Yusuke, Iguchi, Toshihiro, Hiraki, Takao, Kanazawa, Susumu

Radiology Case Reports 13 ( 6 ) 1195 - 1198 2018

Arteriopathy after transarterial chemo-lipiodolization for hepatocellular carcinoma Reviewed

Matsui, Y., Figi, A., Horikawa, M., {Jahangiri Noudeh}, Y., Tomozawa, Y., Hashimoto, K., Kaufman, J.A., Farsad, K.

Diagnostic and Interventional Imaging 98 ( 12 ) 827 - 835 2017.12

Robotically Driven CT-guided Needle Insertion: Preliminary Results in Phantom and Animal Experiments Reviewed

Hiraki, Takao, Kamegawa, Tetsushi, Matsuno, Takayuki, Sakurai, Jun, Kirita, Yasuzo, Matsuura, Ryutaro, Yamaguchi, Takuya, Sasaki, Takanori, Mitsuhashi, Toshiharu, Komaki, Toshiyuki, Masaoka, Yoshihisa, Matsui, Yusuke, Fujiwara, Hiroyasu, Iguchi, Toshihiro, Gobara, Hideo, Kanazawa, Susumu

Radiology 285 ( 2 ) 454 - 461 2017.11

Tumor Dose Response in Yttrium-90 Resin Microsphere Embolization for Neuroendocrine Liver Metastases: A Tumor-Specific Analysis with Dose Estimation Using SPECT-CT Reviewed

Chansanti, Orapin, Jahangiri, Younes, Matsui, Yusuke, Adachi, Akira, Geeratikun, Yindee, Kaufman, John A., Kolbeck, Kenneth J., Stevens, Jeffrey S., Farsad, Khashayar

Journal of Vascular and Interventional Radiology 28 ( 11 ) 1528 - 1535 2017.11

Baseline tumor Lipiodol uptake after transarterial chemoembolization for hepatocellular carcinoma: identification of a threshold value predicting tumor recurrence Reviewed

Matsui, Yusuke, Horikawa, Masahiro, {Jahangiri Noudeh}, Younes, Kaufman, John A., Kolbeck, Kenneth J., Farsad, Khashayar

Radiology and Oncology 51 ( 4 ) 393 - 400 2017.7

Mechanisms of Günther Tulip filter tilting during transfemoral placement Reviewed

Matsui, Y, Horikawa, M, Ohta, K, {Jahangiri Noudeh}, Y, Kaufman, J.A., Farsad, K

Diagnostic and Interventional Imaging 98 ( 7-8 ) 543 - 549 2017.7

Disappearance of Renal Cysts Included in Ice Ball During Cryoablation of Renal-Cell Carcinoma: A Potential Therapy for Symptomatic Renal Cysts? Reviewed

Yodoya, Mitsuko, Hiraki, Takao, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Matsui, Yusuke, Masaoka, Yoshihisa, Sakurai, Jun, Mitsuhashi, Toshiharu, Gobara, Hideo, Kanazawa, Susumu

Journal of Vascular and Interventional Radiology 28 ( 6 ) 869 - 876 2017.6

Value of percutaneous needle biopsy of small renal tumors in patients referred for cryoablation Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Gobara, Hideo, Fujiwara, Hiroyasu, Sakurai, Jun, Matsui, Yusuke, Araki, Motoo, Nasu, Yasutomo, Kanazawa, Susumu

Minimally Invasive Therapy & Allied Technologies 26 ( 2 ) 86 - 91 2017.3

Radiofrequency ablation of pulmonary metastases from sarcoma: single-center retrospective evaluation of 46 patients Reviewed

Sato, Takuya, Iguchi, Toshihiro, Hiraki, Takao, Gobara, Hideo, Fujiwara, Hiroyasu, Sakurai, Jun, Matsui, Yusuke, Mitsuhashi, Toshiharu, Soh, Junichi, Toyooka, Shinichi, Kanazawa, Susumu

Japanese Journal of Radiology 35 ( 2 ) 61 - 67 2017.2

Needle Tract Seeding after Percutaneous Cryoablation of a Metastatic Hepatic Tumor from Renal Cell Carcinoma: A Case Report Reviewed

Gobara, Hideo, Komaki, Toshiyuki, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Sakurai, Jun, Matsui, Yusuke, Uka, Mayu, Masaoka, Yoshihisa, Umeda, Yuzo, Hiraki, Takao, Kanazawa, Susumu

Interventional Radiology 2 ( 3 ) 104 - 107 2017

Radiofrequency ablation of pulmonary tumors near the diaphragm Reviewed

Iguchi, T., Hiraki, T., Gobara, H., Fujiwara, H., Sakurai, J., Matsui, Y., Mitsuhashi, T., Toyooka, S., Kanazawa, S.

Diagnostic and Interventional Imaging 98 ( 7-8 ) 535 - 541 2017

A Case of Solitary Metastasis from a Hepatocellular Carcinoma to the Sacral Bone Successfully Treated with Percutaneous Cryoablation Reviewed

Umakoshi, Noriyuki, Gobara, Hideo, Hiraki, Takao, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Sakurai, Jun, Matsui, Yusuke, Masaoka, Yoshihisa, Ihara, Hiroki, Wada, Toshiaki, Seno, Tomonori, Kanazawa, Susumu

Interventional Radiology 2 ( 1 ) 14 - 18 2017

Translumbar Embolization of a Type 2 Endoleak after Endovascular Aneurysm Repair Involving Five Communicating Arteries and the Endoleak Sac: A Case Report Reviewed

Komaki, Toshiyuki, Fujiwara, Hiroyasu, Hiraki, Takao, Iguchi, Toshihiro, Matsui, Yusuke, Gobara, Hideo, Kanazawa, Susumu

Interventional Radiology 2 ( 3 ) 89 - 93 2017

Simultaneous biopsy and radiofrequency ablation of T1a renal cell carcinoma Reviewed

Iguchi, T, Hiraki, T, Tomita, K, Gobara, H, Fujiwara, H, Sakurai, J, Matsui, Y, Kanazawa, S

Diagnostic and Interventional Imaging 97 ( 11 ) 1159 - 1164 2016.11

Long-Term Survival after Radiofrequency Ablation of Lung Oligometastases from Five Types of Primary Lesions: A Retrospective Evaluation Reviewed

Omae, Kenichi, Hiraki, Takao, Gobara, Hideo, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Matsui, Yusuke, Toyooka, Shinichi, Nagasaka, Takeshi, Kanazawa, Susumu

Journal of Vascular and Interventional Radiology 27 ( 9 ) 1362 - 1370 2016.9

Single Center Prospective Phase II Trial of CT-guided Radiofrequency Ablation for Pulmonary Metastases from Colorectal Cancer (SCIRO-1401). Reviewed

Sakurai, Jun, Matsui, Yusuke, Hiraki, Takao, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Gobara, Hideo, Mitsuhashi, Toshiharu, Nagasaka, Takeshi, Kanazawa, Susumu

Acta medica Okayama 70 ( 4 ) 317 - 21 2016.8

Radiofrequency Ablation of Lung Tumors Using a Multitined Expandable Electrode: Impact of the Electrode Array Diameter on Local Tumor Progression Reviewed

Ihara, Hiroki, Gobara, Hideo, Hiraki, Takao, Mitsuhashi, Toshiharu, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Matsui, Yusuke, Soh, Junichi, Toyooka, Shinichi, Kanazawa, Susumu

Journal of Vascular and Interventional Radiology 27 ( 1 ) 87 - 95 2016.1

CT fluoroscopy-guided preoperative short hook wire placement for small pulmonary lesions: evaluation of safety and identification of risk factors for pneumothorax Reviewed

Iguchi, Toshihiro, Hiraki, Takao, Gobara, Hideo, Fujiwara, Hiroyasu, Matsui, Yusuke, Miyoshi, Shinichiro, Kanazawa, Susumu

European Radiology 26 ( 1 ) 114 - 121 2016.1

Fracture of totally implanted central venous access devices: a propensity-score-matched comparison of risks for Groshong silicone versus polyurethane catheters Reviewed

Kojima, S, Hiraki, T, Gobara, H, Iguchi, T, Fujiwara, H, Matsui, Y, Mitsuhashi, T, Kanazawa, S

J Vasc Access 17 ( 6 ) 535 - 541 2016

Evaluation of Lung Radiofrequency Ablation With Dual-Energy Computed Tomography Reviewed

Tomita, Koji, Hiraki, Takao, Gobara, Hideo, Fujiwara, Hiroyasu, Iguchi, Toshihiro, Matsui, Yusuke, Kanazawa, Susumu

Journal of Computer Assisted Tomography 40 ( 5 ) 752 - 756 2016

Safety of Percutaneous Cryoablation in Patients with Painful Bone and Soft Tissue Tumors: A Single Center Prospective Study (SCIRO-1502) Reviewed

Iguchi, T, Sakurai, J, Hiraki, T, Gobara, H, Fujiwara, H, Matsui, Y, Masaoka, Y, Kanazawa, S, {Acta Med}, Okayama

Acta Med Okayama 70 ( 4 ) 303 - 306 2016

Radiation Exposure of Interventional Radiologists During Computed Tomography Fluoroscopy-Guided Renal Cryoablation and Lung Radiofrequency Ablation: Direct Measurement in a Clinical Setting Reviewed

Matsui, Y, Hiraki, T, Gobara, H, Iguchi, T, Fujiwara, H, Kawabata, T, Yamauchi, T, Yamaguchi, T, Kanazawa, S

Cardiovasc Intervent Radiol 39 ( 6 ) 894 - 901 2016

Simultaneous Multiple Preoperative Localizations of Small Pulmonary Lesions Using a Short Hook Wire and Suture System Reviewed

Iguchi, T, Hiraki, T, Gobara, H, Fujiwara, H, Matsui, Y, Sugimoto, S, Toyooka, S, Oto, T, Miyoshi, S, Kanazawa, S

Cardiovasc Intervent Radiol 38 ( 4 ) 971 - 976 2015

Radiofrequency ablation of lung metastases from adenoid cystic carcinoma of the head and neck: retrospective evaluation of nine patients Reviewed

Iguchi, T, Hiraki, T, Gobara, H, Fujiwara, H, Matsui, Y, Toyooka, S, Nishizaki, K, Kanazawa, S

J Vasc Interv Radiol 26 ( 5 ) 703 - 708 2015

Percutaneous radiofrequency ablation of lung cancer presenting as ground-glass opacity Reviewed

Iguchi, T, Hiraki, T, Gobara, H, Fujiwara, H, Matsui, Y, Soh, J, Toyooka, S, Kiura, K, Kanazawa, S

Cardiovasc Intervent Radiol 38 ( 2 ) 409 - 415 2015

Transfissural route used for preoperative localization of small pulmonary lesions with a short hook wire and suture system Reviewed

Iguchi, T, Hiraki, T, Gobara, H, Fujiwara, H, Matsui, Y, Sugimoto, S, Toyooka, S, Oto, T, Miyoshi, S, Kanazawa, S

Cardiovasc Intervent Radiol 38 ( 1 ) 222 - 226 2015

Transosseous Route for CT Fluoroscopy-Guided Radiofrequency Ablation of Lung Tumors Reviewed

Iguchi, T, Hiraki, T, Ishii, H, Gobara, H, Fujiwara, H, Matsui, Y, Kanazawa, S

J Vasc Interv Radiol 26 ( 11 ) 1694 - 1698 2015

Fever after lung radiofrequency ablation: Prospective evaluation of its incidence and associated factors Reviewed

Masaoka, Y, Hiraki, T, Gobara, H, Iguchi, T, Fujiwara, H, Matsui, Y, Toyooka, S, Soh, J, Kiura, K, Kanazawa, S

Eur J Radiol 84 ( 11 ) 2202 - 2209 2015

Long-Term Survival following Percutaneous Radiofrequency Ablation of Colorectal Lung Metastases Reviewed

Matsui, Y, Hiraki, T, Gobara, H, Iguchi, T, Fujiwara, H, Nagasaka, T, Toyooka, S, Kanazawa, S

J Vasc Interv Radiol 26 ( 3 ) 303 - 310 2015

Association between reperfusion and shrinkage percentage of the aneurysmal sac after embolization of pulmonary arteriovenous malformation: evaluation based on contrast-enhanced thin-section CT images Reviewed

Makimoto, Satoko, Hiraki, Takao, Gobara, Hideo, Fujiwara, Hiroyasu, Iguchi, Toshihiro, Matsui, Yusuke, Mimura, Hidefumi, Kanazawa, Susumu

Japanese Journal of Radiology 32 ( 5 ) 266 - 273 2014.5

Radiofrequency Ablation for Early-Stage Nonsmall Cell Lung Cancer Reviewed

Hiraki, Takao, Gobara, Hideo, Iguchi, Toshihiro, Fujiwara, Hiroyasu, Matsui, Yusuke, Kanazawa, Susumu

BioMed Research International 2014 1 - 11 2014

A case of pulmonary aspergilloma treated with radiofrequency ablation Reviewed

Hiraki, T, Gobara, H, Kato, K, Fujiwara, H, Iguchi, T, Matsui, Y, Kanazawa, S

Cardiovasc Intervent Radiol 37 ( 2 ) 554 - 557 2014

Percutaneous radiofrequency ablation for pulmonary metastases from esophageal cancer: retrospective evaluation of 21 patients Reviewed

Matsui, Y, Hiraki, T, Gobara, H, Fujiwara, H, Iguchi, T, Shirakawa, Y, Fujiwara, T, Toyooka, S, Kanazawa, S

J Vasc Interv Radiol 25 ( 10 ) 1566 - 1572 2014

Creation of an artificial hydromediastinum for radiofrequency ablation of lung tumor: a report of two cases Reviewed

Hiraki, T, Gobara, H, Iguchi, T, Fujiwara, H, Matsui, Y, Kanazawa, S

J Vasc Interv Radiol 25 ( 11 ) 1834 - 1837 2014

Radiofrequency ablation as treatment for pulmonary metastasis of colorectal cancer Reviewed

Hiraki, T, Gobara, H, Iguchi, T, Fujiwara, H, Matsui, Y, Kanazawa, S

World J Gastroenterol 20 ( 4 ) 988 - 996 2014

A case of acute superior mesenteric artery embolism with severe ischemic liver injury successfully treated by endovascular treatment Reviewed

Matsui, Y, Mimura, H, Fukazawa, T, Morita, I, Suehiro, M, Kawamoto, H, Naomoto, Y

Acta Med Okayama 67 ( 6 ) 397 - 402 2013

CT fluoroscopy-guided cutting needle biopsy of focal pure ground-glass opacity lung lesions: diagnostic yield in 83 lesions Reviewed

Inoue, D, Gobara, H, Hiraki, T, Mimura, H, Kato, K, Shibamoto, K, Iishi, T, Matsui, Y, Toyooka, S, Kanazawa, S

Eur J Radiol 81 ( 2 ) 354 - 359 2012

A case of cecal volvulus in a cerebral palsy patient: Usefullness of multidetector computed tomography for preoperative diagnosis Reviewed

Matsui, Yusuke, Takaoka, Munenori, Soda, Yuko, Michisita, Norishige, Hayashi, Jiro, Yoshida, Kazuhiro, Naomoto, Yoshio, Kawamoto, Hirofumi, Mimura, Hidefumi

Kawasaki Medical Journal 38 ( 4 ) 205 - 209 2012

Phrenic nerve injury after radiofrequency ablation of lung tumors: retrospective evaluation of the incidence and risk factors Reviewed

Matsui, Y, Hiraki, T, Gobara, H, Uka, M, Masaoka, Y, Tada, A, Toyooka, S, Mitsuhashi, T, Mimura, H, Kanazawa, S

J Vasc Interv Radiol 23 ( 6 ) 780 - 785 2012

Radiofrequency ablation of lung cancer at Okayama University Hospital: a review of 10 years of experience Reviewed

Hiraki, T, Gobara, H, Mimura, H, Toyooka, S, Fujiwara, H, Yasui, K, Sano, Y, Iguchi, T, Sakurai, J, Tajiri, N, Mukai, T, Matsui, Y, Kanazawa, S

Acta Med Okayama 65 ( 5 ) 287 - 297 2011

Percutaneous radiofrequency ablation of clinical stage I non-small cell lung cancer Reviewed

Hiraki, T, Gobara, H, Mimura, H, Matsui, Y, Toyooka, S, Kanazawa, S

J Thorac Cardiovasc Surg 142 ( 1 ) 24 - 30 2011

Role of computed tomography fluoroscopy-guided cutting needle biopsy of lung lesions after transbronchial examination resulting in negative diagnosis Reviewed

Matsui, Y, Hiraki, T, Mimura, H, Gobara, H, Inoue, D, Iishi, T, Toyooka, S, Kanazawa, S

Clin Lung Cancer 12 ( 1 ) 51 - 55 2011

Does tumor type affect local control by radiofrequency ablation in the lungs? Reviewed

Hiraki, T, Gobara, H, Mimura, H, Sano, Y, Tsuda, T, Iguchi, T, Fujiwara, H, Kishi, R, Matsui, Y, Kanazawa, S

Eur J Radiol 74 ( 1 ) 136 - 141 2010

Incidence of and risk factors for pneumothorax and chest tube placement after CT fluoroscopy-guided percutaneous lung biopsy: retrospective analysis of the procedures conducted over a 9-year period Reviewed

Hiraki, T, Mimura, H, Gobara, H, Shibamoto, K, Inoue, D, Matsui, Y, Kanazawa, S

AJR Am J Roentgenol 194 ( 3 ) 809 - 814 2010

CT fluoroscopy-guided biopsy of 1,000 pulmonary lesions performed with 20-gauge coaxial cutting needles: diagnostic yield and risk factors for diagnostic failure Reviewed

Hiraki, T, Mimura, H, Gobara, H, Iguchi, T, Fujiwara, H, Sakurai, J, Matsui, Y, Inoue, D, Toyooka, S, Sano, Y, Kanazawa, S

Chest 136 ( 6 ) 1612 - 1617 2009

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Papers - MATSUI Yusuke