Updated on 2025/06/20

写真a

 
IGUCHI Toshihiro
 
Organization
Faculty of Health Sciences Professor
Position
Professor
External link

Degree

  • 医学博士 ( 2003.9   岡山大学 )

Research Interests

  • Interventional Radiology

  • 腹部画像診断

Research Areas

  • Life Science / Radiological sciences

Research History

  • 岡山大学 大学院保健学研究科 副研究科長

    2023.4

      More details

  • 岡山大学 グローバル人材育成院 副院長

    2023.4 - 2025.3

      More details

  • 岡山大学 大学院保健学研究科 放射線技術科学分野 分野長

    2023.4 - 2025.3

      More details

  • 岡山大学 医学部保健学科 放射線技術科学専攻 専攻長

    2023.4 - 2025.3

      More details

  • 岡山大学大学院保健学研究科 研究科長補佐(国際、国家試験担当)

    2021.12 - 2023.3

      More details

▼display all

Professional Memberships

Committee Memberships

  • 第54回日本IVR学会総会   プログラム委員  

    2025.5   

      More details

  • 第84回日本医学放射線学会総会   プログラム委員  

    2025.4   

      More details

  • 第83回日本医学放射線学会総会   プログラム委員  

    2024.4   

      More details

  • 第52回日本IVR学会総会   プログラム委員  

    2023.5   

      More details

  • 第82回日本医学放射線学会総会   プログラム委員  

    2023.4   

      More details

▼display all

 

Papers

  • Reduction of metal artifact from cryoprobe using tilt CT scanning with metal artifact reduction algorithms for CT-guided cryoablation. Reviewed

    Tomohiro Inoue, Noriyuki Umakoshi, Yusuke Matsui, Shota Tanaka, Takatsugu Yamauchi, Toshihiro Iguchi, Koji Tomita, Mayu Uka, Mitsugi Honda, Takao Hiraki

    Radiological physics and technology   2025.6

     More details

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

    Computed tomography (CT) is a simple and useful method for monitoring during cryoablation; however, image quality is degraded by artifacts caused by the cryoprobe used during treatment. We evaluated the effectiveness of combining tilt scanning and single-energy metal artifact reduction (SEMAR) to improve image quality. A cryoprobe was inserted into an agar phantom, and CT scans were performed at various angles (0°, 5°, 10°, 15°, and 20°) with and without metal artifact reduction. The relative artifact index, calculated using the CT value standard deviation, was used to evaluate the intensity. The strongest tip artifacts occurred at 0°. The relative artifact index decreased with increasing tilt angles. The tilted scanning reduced artifacts extending beyond the cryoprobe tip, but SEMAR demonstrated a limited effect on artifact reduction. The tilted scanning method may be a useful approach for improving the image quality around the cryoprobe without increasing the exposure dose.

    DOI: 10.1007/s12194-025-00923-0

    PubMed

    researchmap

  • Percutaneous cryoablation versus robot-assisted partial nephrectomy for small renal cell carcinoma: a retrospective cost analysis at Japanese single-institution. Reviewed

    Mayu Uka, Toshihiro Iguchi, Kensuke Bekku, Tomoaki Yamanoi, Toshiharu Mitsuhashi, Hideo Gobara, Noriyuki Umakoshi, Takahiro Kawabata, Koji Tomita, Yusuke Matsui, Motoo Araki, Takao Hiraki

    International journal of clinical oncology   2025.6

     More details

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

    BACKGROUND: No direct cost comparison has been conducted between percutaneous cryoablation (PCA) and robot-assisted partial nephrectomy (RAPN) for clinical T1a renal cell carcinoma (RCC) in Japan. This study aimed to compare their costs. METHODS: We retrospectively analyzed data from 212 PCAs (including 155 with transcatheter arterial embolization) and 119 RAPN cases performed between December 2017 and May 2022. RESULTS: PCA patients were older with higher American Society of Anesthesiologists scores, Charlson Comorbidity Index, and history of previous RCC treatment, cardiovascular disease, and antithrombotic drug use than RAPN patients. PCA was associated with a significantly shorter procedure time and hospitalization duration with fewer major complications than those associated with RAPN. While PCA incurred a slightly lower total cost (1,123,000 vs. 1,155,000 yen), it had a significantly higher procedural cost (739,000 vs. 693,000 yen) and markedly worse total (- 93,000 vs. 249,000 yen) and procedural income-expenditure balance (- 189,000 vs. 231,000 yen) than those of RAPN. After statistical adjustment, PCA demonstrated significantly higher total (difference: 114,000 yen) and procedural costs (difference: 72,000 yen), alongside significantly worse total (difference: - 358,000 yen) and procedural income-expenditure balances (difference: - 439,000 yen). The incremental cost-effectiveness ratio was more favorable for PCA than for RAPN. CONCLUSION: For high- risk patients, PCA demonstrated a safer option with shorter hospitalization duration than those of RAPN. Although PCA was more cost-effective, its higher procedural cost and unfavorable income-expenditure balance require careful evaluation, especially for large tumors that require three or more needles.

    DOI: 10.1007/s10147-025-02783-5

    PubMed

    researchmap

  • Evaluation of the need for preoperative short hookwire placement for small pulmonary lesions. Reviewed

    Noriyuki Umakoshi, Toshihiro Iguchi, Hiroyuki Ujike, Toshiharu Mitsuhashi, Yusuke Matsui, Koji Tomita, Soichiro Okamoto, Kazuaki Munetomo, Seiichiro Sugimoto, Shinichi Toyooka, Takao Hiraki

    Japanese journal of radiology   2025.5

     More details

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

    PURPOSE: Although preoperative marking is often required to accurately locate the targets for video-assisted thoracic surgery, target lesions can be identified intraoperatively without marking in some cases; however, the frequency and characteristics of these lesions remain unclear. Therefore, we aimed to retrospectively evaluate the need for a short hookwire for preoperative localization of small pulmonary lesions. MATERIALS AND METHODS: Computed tomography (CT)-guided short hookwire placement was performed for 176 lesions (mean diameter, 7.9 ± 3.5 mm) in 171 sessions prior to video-assisted thoracoscopic surgery. Placement was performed if one or more of the following CT findings were present: lesions (1) ≤ 10 mm in diameter; (2) ≥ 5 mm from the pleural surface, and (3) predominantly consisting of ground-glass opacity. The need for a hookwire for intraoperative lesion detection was retrospectively assessed based on surgical records. Factors associated with the absence of a hookwire for lesion detection were determined using univariate and multivariate analyses. RESULTS: Placement was successful in all cases; however, the hookwire was dislodged at the time of surgery in four lesions (2%). Among the remaining 172 lesions, thoracoscopic resection was performed using a hookwire as a landmark in 101 lesions (58.7%), whereas 71 lesions (41.3%) were detectable without a hookwire. Previous ipsilateral lung resection significantly increased the odds of not needing a hook wire (OR 4.24; P = 0.005). Larger target lesions (mean, 8.4 vs. 7.1 mm) and those located further from the pleura (mean, 13.3 vs. 8.0 mm) were associated with an increased need for hook wires. Multivariate analysis revealed that experienced surgeons required more hookwires compared to trainees (P = 0.029). Solid nodules did not require hookwires (P = 0.032). CONCLUSION: Shallow solid lesions in patients with a history of ipsilateral lung resection may not require hookwire placement during resection, even if they are small.

    DOI: 10.1007/s11604-025-01807-4

    PubMed

    researchmap

  • The Global Reading Room: Interventional Management of a Renal Mass. Invited International journal

    Roberto Luigi Cazzato, Dimitrios K Filippiadis, Debra A Gervais, Toshihiro Iguchi

    AJR. American journal of roentgenology   224 ( 4 )   e2431781   2025.4

     More details

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

    DOI: 10.2214/AJR.24.31781

    PubMed

    researchmap

  • Potential for Radiation Dose Reduction in Temporal Bone CT Imaging Using Photon-Counting Detector CT. Reviewed

    Fumiyo Higaki, Yusuke Morimitsu, Toshihiro Iguchi, Sung Il Hwang, Takahiro Kitayama, Yuka Takahashi, Mayu Uka, Noriaki Akagi, Akiko Sugaya, Toshiharu Mitsuhashi, Yusuke Matsui, Takao Hiraki

    Acta medica Okayama   79 ( 2 )   75 - 80   2025.4

     More details

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

    Temporal bone computed tomography (CT) is frequently performed for pediatric patients with ear diseases. Advances in CT technology have improved diagnostic imaging quality, but reduction of radiation exposure remains a goal. We evaluated the potential for radiation dose reduction in temporal bone CT examinations using porcine ear ossicles and a photon-counting detector CT system. Three scans of the bilateral temporal bone were performed on each of three pig cadaver heads. In each of seven successive imaging sessions, the radiation dose was reduced by an additional one-seventh of the recommended dose (RD). Two board-certified radiologists independently scored the resulting images on a scale of 1 to 5 points, where 5 represented the image quality at the RD. Images scoring ≥4.5 points were considered acceptable. Noise was assessed in a 2-cm-diameter region near the ear ossicles, and standard deviation was measured for each of the seven decrements from the RD. As the radiation dose decreased, the noise progressively increased, and visual assessment scores progressively decreased. Acceptable image scores were obtained at six-sevenths (4.9), five-sevenths (4.8), four-sevenths (4.7), and three-sevenths (4.6) of the RD. Thus, acceptable porcine temporal bone CT images were obtained with a radiation dose reduction of approximately 50%.

    DOI: 10.18926/AMO/68645

    PubMed

    researchmap

▼display all

Books

  • これから始めるIVR

    冨田晃司, 生口俊浩, 平木隆夫( Role: Contributor ,  癌に対するアブレーション治療に必要なデバイスを覚えよう)

    メジカルビュー社  2022.3  ( ISBN:9784758321112

     More details

  • 遺伝性腫瘍学入門 遺伝性腫瘍の基礎知識

    田中高志, 生口俊浩, 平木隆夫, 金澤 右( Role: Contributor ,  遺伝性腫瘍の画像診断)

    メディカルドゥ  2022.1  ( ISBN:9784909508164

     More details

  • 遺伝性腫瘍学入門 遺伝性腫瘍の基礎知識

    生口俊浩, 平木隆夫, 金澤 右( Role: Contributor ,  遺伝性腎癌に対するアブレーション治療)

    メディカルドゥ  2022.1  ( ISBN:9784909508164

     More details

  • 血管腫・血管奇形の診断と治療のストラテジー

    三村秀文, 金澤 右, 藤原寛康, 兵頭 剛, 生口俊浩, 平木隆夫, 田頭周一, 向井 敬, 安井光太郎, 光嶋 勲( Role: Contributor ,  静脈奇形に対するポリドカノールを用いた硬化療法)

    2004 

     More details

MISC

  • 腫瘍性病変に対するサーマルアブレーションの現状 1.肺腫瘍のラジオ波焼灼療法 Reviewed

    松井裕輔, 冨田晃司, 宇賀麻由, 馬越紀行, 川端隆寛, 生口俊浩, 平木隆夫

    IVR会誌   38   76 - 82   2023.12

     More details

  • 東レP-UセルサイトポートMS ~穿刺からカテーテル留置までの安全性を高める~ Invited

    宗友一晃, 生口俊浩, 平木隆夫

    Rad Fan   21 ( 1 )   68 - 71   2023.1

     More details

  • 新しい温度センサを集積した光ファイバプローブを用いたレーザ照射加熱治療器 Reviewed

    深野 秀樹, 生口 俊浩, 馬越 紀行, 櫻井 淳

    Thermal Medicine   39   81   2023

  • 腎癌に対するアブレーション治療 Invited

    生口 俊浩, 平木 隆夫, 松井 裕輔, 冨田 晃司, 宇賀 麻由, 郷原 英夫, 金澤 右

    日本インターベンショナルラジオロジー学会雑誌   36 ( 1 )   2 - 6   2021.10

     More details

    Authorship:Lead author, Corresponding author  

    researchmap

  • 中心静脈ポート留置術と管理に関するガイドライン

    山上 卓士, 菅原 俊祐, 荒井 保明, 加藤 恵子, 高良 真一, 坂本 憲昭, 曽根 美雪, 祖父江 慶, 瀧川 政和, 徳江 浩之, 橋本 一樹, 三村 秀文, 山西 伴明, 石井 裕朗, 生口 俊浩, 一条 祐輔, 馬越 紀行, 海野 俊之, 大熊 正剛, 岡本 大佑, 片山 直人, 川田 紘資, 久保 貴俊, 小徳 暁生, 佐藤 塁, 芝本 健太郎, 鈴木 智大, 鈴木 美知子, 田村 明生, 徳田 俊英, 冨田 晃司, 富田 隼人, 富松 浩隆, 林 奈津子, 原口 貴史, 藤原 圭史, 前田 新作, 正田 哲也, 三浦 剛史, 宮川 天志, 森田 慎一, 山本 和宏, 和田 慎司, 稲葉 吉隆, 森田 荘二郎, 渡邊 正志, 日本IVR学会, 日本IVR学会中心静脈ポートガイドライン作成委員会

    日本インターベンショナルラジオロジー学会雑誌   35 ( 4 )   359 - 397   2021.5

     More details

    Language:Japanese   Publisher:(一社)日本インターベンショナルラジオロジー学会  

    researchmap

▼display all

Presentations

  • Incidence of local recurrence and dissemination in cryoablation for cystic renal cell carcinoma

    Koji Tomita, Yusuke Matsui, Noriyuki Umakoshi, Soichiro Okamoto, Kazuaki Munetomo, Toshihiro Iguchi, Takao Hiraki

    JSIR&ISIR2025 (Tokyo) 

     More details

    Event date: 2025.5.29 - 2025.5.31

    Language:English  

    researchmap

  • Needle tract seeding after percutaneous biopsy followed by cryoablation for renal cell carcinoma

    Noriyuki Umakoshi, Yusuke Matsui, Koji Tomita, Soichiro Okamoto, Kazuaki Munetomo, Toshihiro Iguchi, Takao Hiraki

    JSIR&ISIR2025 (Tokyo) 

     More details

    Event date: 2025.5.29 - 2025.5.31

    Language:English  

    researchmap

  • Saline Sealing of Needle Tract to Prevent Pneumothorax in CT-Guided Lung Biopsy: Retrospective Study

    Soichiro Okamoto, Yusuke Matsui, Koji Tomita, Kazuaki Munetomo, Noriyuki Umakoshi, Toshihiro Iguchi, Takao Hiraki

    JSIR&ISIR2025 (Tokyo) 

     More details

    Event date: 2025.5.29 - 2025.5.31

    Language:English  

    researchmap

  • Evaluation of Informed Consent Videos Prior to Interventional Procedures by Patient Questionnaire

    Tadataka Hirai, Noriyuki Umakoshi, Yusuke Matsui, Koji Tomita, Soichiro Okamoto, Kazuaki Munetomo, Toshihiro Iguchi, Takao Hiraki

    JSIR&ISIR2025 (Tokyo) 

     More details

    Event date: 2025.5.29 - 2025.5.31

    Language:English  

    researchmap

  • 脾臓生検直後に出血性ショックを来した 1 例

    佐治 真美, 岡本 聡一郎, 宗友 一晃, 馬越 紀行, 冨田 晃司, 松井 祐輔, 生口 俊浩, 肥山 隆一郎, 平木 隆夫

    第141回日本医学放射線学会 中国・四国地方会(高松) 

     More details

    Event date: 2024.12.13 - 2024.12.14

    researchmap

▼display all

Awards

  • The most reviews carried out in 2023

    2024.8   CardioVascular and Interventional Radiology (CVIR)  

     More details

  • Interventional Radiology誌 Best Reviewer Award 2023

    2024.5   日本IVR学会  

     More details

  • Featured Abstract

    2024.5   第53回日本IVR学会総会  

     More details

  • CyPos賞 Silver Medal

    2023.5   第82回日本医学放射線学会総会  

     More details

  • 2022 Japanese Journal of Radiology (JJR) Excellent Reviewer Award

    2023.4  

     More details

▼display all

Research Projects

  • 定量画像を用いたフォトンカウンティングCTによる超低線量肺癌検診法の確立

    2025.06 - 2026.05

    公益財団法人岡山県健康づくり財団  令和7年度「がんに関する研究助成金」 

    生口俊浩, 淺原 孝, 檜垣文代, 林裕晃

      More details

  • 定量イメージング技術による単純CTにおける腹部臓器腫瘍の新規診断戦略の開発

    2025.06 - 2026.03

    公益財団法人ウエスコ学術振興財団  令和7年度学術研究費助成事業「研究活動費助成」 

    生口俊浩, 淺原 孝, 檜垣文代, 林 裕晃

      More details

  • フォトンカウンティングCTで生成した定量画像による冠動脈プラークの評価手法の確立

    2025.04 - 2027.03

    公益信託 循環器学研究振興基金 2024年度 研究助成 

    淺原 孝, 林 裕晃, 生口俊浩

      More details

    Authorship:Coinvestigator(s) 

    researchmap

  • 肺癌に対するマイクロ波焼灼術の安全性と有効性の検討ー単施設単群前向きオープン試験

    Grant number:22K07796  2022.04 - 2025.03

    日本学術振興会  科学研究費助成事業 基盤研究(C)  基盤研究(C)

    冨田晃司, 生口俊浩, 松井裕輔, 宇賀麻由, 櫻井 淳, 平木隆夫

      More details

    Authorship:Coinvestigator(s) 

    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    researchmap

  • 温度センサが集積された広い適用性の極細レーザ照射光ファイバ加熱治療器の研究

    Grant number:22H03975  2022.04 - 2025.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    深野秀樹, 生口俊浩, 馬越紀行, 櫻井 淳

      More details

    Authorship:Coinvestigator(s) 

    Grant amount:\17680000 ( Direct expense: \13600000 、 Indirect expense:\4080000 )

    researchmap

▼display all

 

Class subject in charge

  • Inter-Professional Work (2024academic year) Summer concentration  - その他

  • Exercise of Team Medical Activities (2024academic year) 1st and 2nd semester  - その他

  • Medical examinations (2024academic year) Fourth semester  - 木7~8

  • Introduction to Medical Sciences (2024academic year) 1st semester  - 火5~6

  • Graduation Thesis in Radiological Technology (2024academic year) 1-3 semesters  - その他

▼display all

 

Social Activities

  • 高齢者の健康について~がんに対する体にやさしい治療~

    Role(s):Lecturer

    笠岡市社会福祉協議会  令和5年度 笠岡ことぶき大学 教養講座  2023.5.15

     More details

  • 岡山健康講座2022 体にやさしいがん治療~画像下治療~

    Role(s):Lecturer

    岡山大学  2022.10

     More details

  • 市民公開講座 がんからあなたを守る~知っておきたい放射線診療最前線~ 「切らずに治すがん治療:IVR」

    Role(s):Lecturer

    公益社団法人 日本医学医放射線学会  2014.4.20

     More details