Faculty Profiles - KAWAZU Toshiyuki

MISC - KAWAZU Toshiyuki

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A case of multiple neurogenic tumors discovered with buccal mucosa schwannoma

久富美紀, 竹下洋平, 河合穂高, 岡田俊輔, 藤倉満美子, 吉田沙織, 河津俊幸, 長塚仁, 柳文修, 柳文修, 浅海淳一, 浅海淳一

日本口腔腫瘍学会総会・学術大会プログラム・抄録集 41st 2023

口腔顎顔面領域の臨床解剖と画像診断

竹下洋平, 河津俊幸, 久富美紀, 岡田俊輔, 藤倉満美子, 伊原木聰一郎, 岩永譲, 岩永譲, 影山幾男, 松下祐樹, TUBBS R. Shane, 浅海淳一, 浅海淳一, 浅海淳一

日本解剖学会総会・全国学術集会講演プログラム・抄録集 127th (CD-ROM) 2022

鼻咽腔に発生した若年性血管線維腫3例の比較検討

清水雄大, 村上純, 河津俊幸, 久富美紀, 藤田麻里子, 竹下洋平, 岡田俊輔, 難波友里, 柳文修, 浅海淳一, 浅海淳一, 浅海淳一

歯科放射線 59 2019

口腔扁平上皮癌術後の再発検出に対するTSE DWIの有用性

筑井徹, WANNAKAMON Panyarak, 河津俊幸, 山下泰生, 武村濃, 吉浦一紀, 吉浦一紀

歯科放射線 57 2017

下顎歯肉に認められた腺扁平上皮癌の1例

見立英史, 大部一成, 吉賀大午, 河津俊幸, 小林家吉, 川野真太郎, 中村誠司

日本口腔腫瘍学会総会・学術大会プログラム・抄録集 28th 2010

Sonographic diagnosis for Mikulicz disease

Mayumi Shimizu, Masafumi Moriyama, Kazutoshi Okamura, Toshiyuki Kawazu, Toru Chikui, Tazuko K. Goto, Yukiko Ohyama, Seiji Nakamura, Kazunori Yoshiura

ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTOLOGY 108 ( 1 ) 105 - 113 2009.7

Language：English Publisher：MOSBY-ELSEVIER

Objective. The aim was to investigate the diagnostic imaging characteristics of Mikulicz disease (MD), especially sonographic ones, and to clarify the differences between them and those in Sjogren syndrome (SS), based on new criteria of MD.
Study design. The sonographic and sialographic images, as well as clinical, histopathologic, and serologic findings of 9 patients satisfying the new criteria of MD were analyzed and compared with those in SS.
Results. All swollen submandibular glands showed bilateral nodal hypoechoic areas with high vascularization on sonograms and a parenchymal defect on sialograms, whereas parotid glands showed normal or slight change on both images. Nodal areas in submandibular gland sonograms were unclear on computerized tomography and on magnetic resonance imaging, but showed accumulation on gallium scintigraphy.
Conclusion. Mikulicz disease showed a high rate of bilateral nodal change in submandibular glands, which was completely different from SS. For detection and follow-up of these changes, sonography may be the best imaging modality. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009; 108: 105-113)

DOI： 10.1016/j.tripleo.2009.02.032

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Treatment of early tongue carcinoma with brachytherapy: Results over a 25-year period

Yusuke Urashima, Katsumasa Nakamura, Yoshiyuki Shioyama, Satoru Nomoto, Sair Ohga, Takashi Toba, Tadamasa Yoshitake, Toru Chikui, Toshiyuki Kawazu, Kenichi Jingu, Hiromi Terashima, Hiroshi Honda

ANTICANCER RESEARCH 27 ( 5B ) 3519 - 3523 2007.9

Language：English Publisher：INT INST ANTICANCER RESEARCH

Background: Brachytherapy for patients with early tongue cancer is an accepted method of treatment. Patients and Methods: The records of 409 patients with T1/2N0M0 tongue cancer treated with brachytherapy between 1978 and 2004 were reviewed. Results: The overall and disease-free 5-year survival rates were 82.3% and 64.6% for patients with T1 disease, and 72.2% and 56.0% for patients with T2 disease, respectively. The 5-year nodal metastasis-free survival rates for patients treated between 1978 and 1986, 1987 and 1996, and 1997 and 2004 were 64.8%, 74.8% and 81.3% for patients with T1 disease (p = 0.22), and 47.4%, 70.4% and 76.4% for patients with T2 disease (p = 0.0011), respectively. The 5-year local recurrence-free survival rates for patients treated between 1978 and 1986, 1987 and 1996, and 1997 and 2004 were 91.0%, 84.0% and 96.9% for patients with T1 disease (p = 0.31), and 87.6%, 83.3% and 85.8% for patients with T2 disease (p = 0. 90), respectively. Conclusion: The incidence rate of nodal metastasis in patients with early tongue cancer improved over the 25-year period studied, while the local recurrence-free survival rates remained stable.

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Is glossectomy necessary for late nodal metastases without clinical local recurrence after initial brachytherapy for N0 tongue cancer? A retrospective experience in 111 patients who received salvage therapy for cervical failure

Y Urashima, K Nakamura, N Kunitake, Y Shioyama, T Sasaki, S Ooga, Y Kuratomi, T Yamamoto, T Kawazu, T Chikui, K Jingu, H Terashima, H Honda

JAPANESE JOURNAL OF CLINICAL ONCOLOGY 36 ( 1 ) 3 - 6 2006.1

Language：English Publisher：OXFORD UNIV PRESS

Purpose: To assess the efficacy of neck dissection (ND) without glossectomy (GL) for late nodal metastases without local recurrence after brachytherapy for N0 tongue cancer.
Materials and methods: Among 396 patients with N0 tongue cancer treated with brachytherapy, a retrospective analysis was performed in 111 patients who were clinically diagnosed as having nodal metastases without local recurrence and whose neck lymph nodes turned out to be pathologically positive after salvage surgery. One hundred and five patients had undergone only ND (the ND group), six patients had undergone ND with GL (the ND+GL group).
Results: The 5 year disease-free and cause-specific survival rates after salvage therapy for the 111 patients included in this study were 58.1 and 61.9%, respectively. In the ND group, there were only nine patients who had local recurrence after ND. In addition, only six patients (5.7%) had a local recurrence within 2 years in the ND group. Sixty-three patients were free of disease after ND, 31 patients had regional or distant metastases without local recurrence and two patients had progressive disease at ND. In the ND+GL group, four patients were alive without disease and two died from regional or distant metastases. None of the patients in the ND+GL group were found to have malignant tissue in the pathological findings from the excised tongue.
Conclusion: GL should be avoided or suspended when the clinical evaluation had revealed cervical failure without apparent local recurrence in the mobile tongue cancer patients after initial brachytherapy.

DOI： 10.1093/jjco/hyi218

Intraoral sonographic features of tongue cancer after radical radiotherapy

Toru Chikui, Toshiyuki Kawazu, Katsumasa Nakamura, Yuusuke Urashima, Kenji Yuasa, Shigenobu Kanda

European Journal of Radiology 52 ( 3 ) 246 - 256 2004.12

Language：English Publishing type：Book review, literature introduction, etc.

Purpose: The purpose was to illustrate the sonographic changes of tongue cancer after radical radiotherapy. Materials and methods: In 24 patients with tongue cancer treated by interstitial brachytherapy (BRT) (uneventful recovery n=16, recurrence n=5, severe soft tissue complication n=3), follow-up examination were performed and both the margin and the vascular pattern were retrospectively assessed. We basically performed US examination at least once every 3 months after BRT within 1 year during follow-up period. Results: In the healing process, intraoral sonography shows an unclear margin immediately after brachytherapy and a transient increase of the vascularity lasted within 6 months after BRT, followed by a decrease in the vascularity. The large difference in echogenicity between the primary site and the surrounding tissue and the increased difference suggested the possibility of either radiation ulceration or recurrence. Conclusion: Intraoral sonography could depict the sequence changes of the tongue after BRT, and it was thus useful to confirm the clinical findings of either radiation ulcers or recurrence. © 2004 Elsevier Ireland Ltd. All rights reserved.

DOI： 10.1016/j.ejrad.2004.01.012

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Quantitative analysis of radiological changes in alveolar bone around connected osseo-integrated dental implants and natural abutment teeth

TAKASHIMA Akihiro, YOSHIURA Kazunori, TOKUMORI Kenji, KAWAZU Toshiyuki, KANDA Shigenobu

19 ( 1 ) 28 - 37 2003.6

Analysis of different approaches to constructing perceptibility curves

YOSHIURA Kazunori, WELANDER Ulf, LI Gang, SHI Xie-Qi, MCDAVID William D., KAWAZU Toshiyuki, TATSUMI Masato, OKAMURA Kazutoshi, KANDA Shigenobu

Oral Radiol 19 ( 1 ) 38 - 48 2003.6

Perceptibility curves for the Digora system

K Yoshiura, U Welander, WD McDavid, G Li, XQ Shi, T Kawazu, M Tatsumi, T Matsuo, S Kanda

DENTOMAXILLOFACIAL RADIOLOGY 32 ( 3 ) 191 - 197 2003.5

Language：English Publisher：BRITISH INST RADIOLOGY

Objectives: To construct perceptibility curves (PCs) for given calibration settings in order to define psychophysical properties of the Digora storage phosphor system and to evaluate the effects of automatic exposure correction (AEC) on the PCs.
Methods: The Digora system was calibrated at two exposures, 80 muC kg(-1) (high calibration) and 40 RC kg(-1) (low calibration). Since the grey levels displayed in the radiographs are adjusted by AEC, dose-response functions at high calibration were obtained using AEC on and off modes. The dose-response function at low calibration was obtained with AEC off. The PC at each experimental setting was calculated using known physical parameters of the system and the performance of the average observer used in a previous study. In addition, PCs were also constructed using transmitted radiation flux behind the test object calculated from the attenuation coefficient in order to study observer and system performance. PCs obtained under these conditions were compared.
Results: The PC using calculated transmitted radiation flux behind the test object showed a wide plateau at the peak owing to AEC, while the PC obtained by a modified approach showed a higher but narrower peak. There were no differences between the two PCs using AEC on and off modes when the PCs were constructed using a modified approach. There were no differences between the two PCs obtained at high and low calibration settings or between the three PCs obtained with AEC on except for the position along the exposure axis.
Conclusions: Psychophysical properties of the Digora system may be determined if we employ registered exposures from a dose-response function with AEC off under a given calibration setting. Under these circumstances the shape and height of the PCs will be unchanged irrespective of the AEC mode.

DOI： 10.1259/dmfr/25806978

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Value of computed tomography findings in differentiating between intraosseous malignant tumors and osteomyelitis of the mandible affecting the masticator space Reviewed

Y Hariya, K Yuasa, E Nakayama, T Kawazu, K Okamura, S Kanda

ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS 95 ( 4 ) 503 - 509 2003.4

Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：MOSBY, INC

Objectives. We sought to evaluate the diagnostic efficacy of computed tomography (CT) images in the differentiation between intraosseous malignant tumors and osteomyelitis spreading into the masticator space.
Study design. A retrospective evaluation was carried out by using CT images from 12 patients with intraosseous malignant tumors and 9 patients with osteomyelitis involving the masticator space and accompanying mandibular bone destruction. The following CT observations are discussed: (1) bone destruction pattern subdivided into spotty, gross, or permeative; (2) cortical bone expansion; (3) diffuse osteosclerotic changes; (4) periosteal reaction; (5) masticator muscle involvement; (6) enlargement of the facial muscle; and (7) attenuation in the subcutaneous adipose tissue.
Results. The pattern of permeative bone destruction, cortical bone expansion, and the enlargement of both the masseter and medial pterygoid muscles were all observed in patients with malignant tumors. In contrast, diffuse sclerotic change and a periosteal reaction were significant observations in patients with osteomyelitis.
Conclusion. The efficacy of CT in establishing a differential diagnosis of malignant tumors or osteomyelitis is supported by this study.

DOI： 10.1067/moe.2003.134

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Application of Neural Networks to the Prediction of Lymph node Metastasis in Oral Cancer Reviewed

Toshiyuki Kawazu, Kazuyuki Araki, Kazunori Yoshiura, Eiji Nakayama, Shigenobu Kanda

Oral Radiology 19 ( 2 ) 137 - 142 2003.4

Diagnostic accuracy of CT in detecting the extent of tumor invasion into the surrounding soft tissue by squamous cell carcinoma of the mandibular gingiva

NAKAYAMA Eiji, YUASA Kenji, TABATA Osamu, KAWAZU Toshiyuki, CHIKUI Toru, KANDA Shigenobu, NAKAMURA Seiji, YOSHIKAWA Hiromasa, OOBU Kazunari, IKEBE Tetsuro, OHISHI Masamichi, SHIRASUNA Kanemitsu

Journal of Japanese Society of Oral Oncology 13 ( 4 ) 253 - 256 2001.12

Language：Japanese Publisher：Japanese Society of Oral Oncology

Objective: To clarify the diagnostic accuracy of CT in detecting the extent of tumor invasion into the surrounding soft tissues by squamous cell carcinoma of the mandibular gingiva.<BR>Method: Axial CT scans of 77 patients with carcinoma of the mandibular gingiva were evaluated by three Oral and maxillof acial radiologists for the tumor invasion into the surrounding soft tissues. All patients underwent excision of the tumor in Kyushu University Dental Hospital from 1992 to 1999, and the presence and the extent of tumor invasion were confirmed by the macroscopic or histopahological findings following surgery. The observers rated their level of confidence for the presence of tumor invasion into genioglossus muscle (GGM), mylohyoid muscle (MHM), intrinsic lingual muscles (ILM), internal pterygoid muscle (IPM), masseter muscle (MM), labiobuccal tissues (LBT), and platysma muscle (PM) on the following five-point scale : 1, negative ; 2, probably negative ; 3, unsure ; 4, probably positive; 5, positive. The mean ROC curve area (Az) of each observer for tumor invasion into each tissue was obtained, and used as the index of diagnostic accuracy.<BR>Results : The mean Az values for the detection of tumor invasion on CT was 0.86 for GGM and IPM, 0.82 for MHM, 0.80 for MM, 0.76 for ILM, 0.71 for LBT, and 0.65 for PM.<BR>Conclusion : We should carefully interpret the tumor invasion into ILM, LBT and PM on CT images referring to the various clinical information, including inspection or palpation.

DOI： 10.5843/jsot.13.Suppliment_253

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DIAGNOSIS OF CERVICAL LYMPH NODE METASTASIS USING POWER DOPPLER ULTRASONOGRAPHY

YUASA Kenji, CHIKUI Toru, KAWAZU Toshiyuki, NAKANO Toshiaki, KUNITAKE Naonobu, NAKAMURA Katsumasa, KANDA Shigenobu

27 ( 3 ) 727 - 731 2001.11

Effects of the automatic exposure compensation on the proximal caries diagnosis

YOSHIURA K, KAWAZU T, TATSUMI M, NAKAYAMA E, SHIMIZU M, GOTO TK, CHIKUI T, OKAMURA K, KANDA S

41 24 - 24 2001.9

Computer-Aided Diagnosis for cervical lymph node metastasis

KAWAZU T, ARAKI K, YUASA K, YOSHIURA K, KANDA S

41 45 - 45 2001.9

Newly Contrived Computer-aided Diagnostic System Using Fuzzy Inference Combined with Neural Network Algorism : An Attempt to the Sonographic Diagnosis

TANAKA T, KAWAZU T, KANDA S

41 79 - 79 2001.9

Conventional and predicted Perceptibility Curves for contrast-enhanced direct digital intraoral radiographs

K Yoshiura, U Welander, XQ Shi, G Li, T Kawazu, M Tatsumi, K Okamura, WD McDavid, S Kanda

DENTOMAXILLOFACIAL RADIOLOGY 30 ( 4 ) 219 - 225 2001.7

Language：English Publisher：NATURE PUBLISHING GROUP

Objectives: To construct Perceptibility Curves (PCs) for contrast-enhanced digital intraoral radiographs
Methods: Radiographs of a test object having holes of increasing depths were exposed using three digital systems, the CDR (Schick Technologies, Long Island, NY, USA), the Dixel (J Morita MFG, Kyoto, Japan) and the Sens-A-Ray (Regam Medical Systems, Sundsvall, Sweden). The radiographs were contrast-enhanced and PCs constructed in the conventional way using 10 observers. Predicted PCs were calculated and compared with observer data.
Results: The PCs showed that contrast enhancement is effective for the perception of small contrast details, especially in the low exposure range. Predicted PCs demonstrated excellent agreement with observer data.
Conclusions: Contrast enhancement should be advantageous in digital radiography. The effects of contrast enhancement on PCs may be predicted without previous knowledge of observer performance.

DOI： 10.1038/sj.dmfr.4600607

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超音波パワードプラ法を用いたリンパ節内血流像による診断

湯浅賢治, 筑井徹, 河津俊幸, 中野敏昭, 國武直信, 中村和正, 神田重信

頭頚部腫瘍 27 ( 2 ) 326 - 326 2001.5

口腔顎顔面領域のInterventional Radiology 各種のIVRとその有効性

中山英二, 湯浅賢治, 河津俊幸

映像情報medical 33 ( 1 ) 63 - 69 2001.1

CT and US findings of cervical lymph node in each location

YUASA K, KAWAZU T, CHIKUI T, KANDA S

40 68 - 68 2000.10

Number of cervical lymph node

YUASA K, KAWAZU T, CHIKUI T, KANDA S

40 85 - 85 2000.10

Clinical evaluation of high-speed digital panoramic X-ray system

TATSUMI M, YOSHIURA K, CHIKUI T, NAKAYAMA E, YUASA K, KAWAZU T, GOTO T, KATO M, KANDA S

40 33 - 33 2000.10

ニューラルネットワークの画像診断への応用

日本医用画像工学会 18(5), 698-702 2000

Development and accuracy of imaging diagnoses for lymph node metastasis with oral cancer

KANDA S, YUASA K, NAKAYAMA E, KAWAZU T, MAEMURA S, ONIZUKA S

39 67 - 67 1999.10

US of the masses in parotid region

GOTO T, YOSHIURA K, NAKAYAMA E, YUASA K, TABATA O, NAKANO T, KAWADU T, TANAKA T, MIWA K, SHIMIZU M, CHIKUI T, OKAMURA K, KANDA S

39 99 - 99 1999.10

Perceptibility curves of direct digital intraoral radiographic systems : Effects of the contrast enhancement

YOSHIURA K, KAWAZU T, CHIKUI T, KANDA S, WELANDER Ulf

39 117 - 117 1999.10

MR imaging of the masses in parotid region

GOTO T, YOSHIURA K, NAKAYAMA E, YUASA K, TABATA O, NAKANO T, KAWADU T, TANAKA T, MIWA K, SHIMIZU M, CHIKUI T, OKAMURA K, KANDA S

39 100 - 100 1999.10

Value of contrast-enhanced magnetic resonance imaging in differentiation of hemangiomas front lymphangiomas in the oral and maxillofacial region Reviewed

K Yonetsu, E Nakayama, T Kawazu, S Kanda, S Ozeki, M Shinohara

ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS 88 ( 4 ) 496 - 500 1999.10

Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：MOSBY-YEAR BOOK INC

Objective. The purpose of this study was to investigate the ability of contrast-enhanced magnetic resonance imaging to differentiate hemangioma from lymphangioma in the oral and maxillofacial region.
Study design. Contrast-enhanced magnetic resonance imaging was performed in 20 patients (21 masses: 17 hemangiomas and 4 lymphangiomas) through use of either a 0.2-T permanent system or a 0.5-T superconductive system and spin-echo pulse sequences.
Results. After intravenous administration of contrast medium, enhancement was observed in all hemangiomas in areas corresponding to those with high signal on T-2-weighted images. Unequivocally increased signal was observed in 10 masses, and slightly increased signal was observed in 7 masses. On the other hand, none of the lymphangiomas showed an enhancing mass on contrast-enhanced T-1-weighted images.
Conclusions. Although contrast-enhanced T-1-weighted imaging may not improve delineation of masses in all cases, it can be used to differentiate between deep hemangiomas and lymphangiomas.

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ニューラルネットワークによる頸部リンパ節転移診断支援の有効性の検討 ROC曲線をもちいた支援効果の検討

荒木和之, 三輪邦弘, 花澤智美, 松田幸子, 山本実佳, 田谷あつ子, 河津俊幸, 岡野友宏

歯科放射線 39 ( 3 ) 179 - 180 1999.9

Physical evaluation of a system for direct digital intra-oral radiography based on a charge-coupled device

K Yoshiura, HC Stamatakis, U Welander, WD McDavid, XQ Shi, S Ban, T Kawazu, M Tatsumi, S Kanda

DENTOMAXILLOFACIAL RADIOLOGY 28 ( 5 ) 277 - 283 1999.9

Language：English Publisher：STOCKTON PRESS

Objectives: To determine technical properties of a direct digital intra-oral radiographic system, the Dixel(R)(J Morita Corporation, Kyoto, Japan).
Methods: A dose response function and the dark current were calculated from two series of exposures to a homogeneous radiation field. The line spread function (LSF) and the modulation transfer function (MTF) were determined from radiographs of an edge. The noise power spectrum (NPS) was determined at three exposures from radiographs exposed to homogeneous radiation fields. Noise equivalent quanta (NEQ) were calculated from the one-dimensional NPS and the MTF. The detective quantum efficiency (DQE) was determined from the NEQ and a representative value of the photon fluence. Signal-to-noise ratios (SNR) were calculated from the NEQs and different signal contrasts.
Results: The dose response function demonstrated a slight curvature. There was no effect of the dark current. NPS ranged from 10(-5)-10(-7) mm(2) depending on exposure and frequency. At a peak of about 2 cycles/mm the DQE is on an average about 30 per cent. SNRs are favorable.
Conclusion: The technical properties found in this study indicate that the Dixel(R)system is suitable for intra-oral dental radiography.

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Prediction of Perceptibility Curves of direct digital intraoral radiographic systems

K Yoshiura, HC Stamatakis, U Welander, WD McDavid, XQ Shi, S Ban, T Kawazu, T Chikui, S Kanda

DENTOMAXILLOFACIAL RADIOLOGY 28 ( 4 ) 224 - 231 1999.7

Language：English Publisher：STOCKTON PRESS

Objectives: To derive and test a method to predict Perceptibility Curves (PCs) for direct digital intraoral radiographic systems.
Methods: A test object was used to determine the performance of an average observer with respect to the threshold contrast and internal noise of the human visual system. These data were combined with system parameters to predict PCs mathematically.
Results: Data on the performance of an average observer could be defined to obtain values of the effective threshold contrast as a function of background gray level. This function combined with the gamma-value of the system predicted PCs that agreed well with PCs obtained in the conventional way.
Conclusion: It is possible to predict PCs from a limited number of system parameters together with predetermined data on an average observer.

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湯浅賢治, 河津俊幸, 中野敏昭

映像情報 31 ( 8 ) 463 - 466 1999.4

The change of CT and US findings of cervical lymphadenopathy in oral squamous cell carcinoma before and after preoperative chemoradiotherapy

Toshiyuki Kawazu, Kenji Yuasa, Shigenobu Kanda, Satoru Ozeki, Masanori Shinohara

Japan Society for Oral Tumors 11 ( 3 ) 135 - 142 1999

The change of CT and US findings of cervical lymphadenopathy in oral squamous cell carcinoma before and after preoperative chemoradiotherapy

KAWAZU Toshiyuki, YUASA Kenji, KANDA Shigenobu, OZEKI Satoru, SHINOHARA Masanori

11 ( 3 ) 135 - 142 1999

ニューラルネットワークによるエナメル上皮腫と歯原性角化嚢胞の画像診断への応用

河津俊幸, 荒木和之, 吉浦一紀, 大関悟, 篠原正徳, 神田重信

日本口腔科学会雑誌 47 ( 5 ) 661 - 661 1998.12

エナメル上皮腫と歯原性角化嚢胞の画像診断学的特徴 CT-axial像の皮質骨所見

河津俊幸, 吉浦一紀, 荒木和之, 神田重信

歯科放射線 38 ( 増刊 ) 57 - 57 1998.9

Mucoepidermoid carcinoma in the mandible - Findings of panoramic radiography and computed tomography

M Inagaki, K Yuasa, E Nakayama, T Kawazu, T Chikui, S Kanda, H Yoshikawa, S Nakamura, M Shinohara

ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS 85 ( 5 ) 613 - 618 1998.5

Language：English Publisher：MOSBY-YEAR BOOK INC

Six patients with mucoepidermoid carcinoma in the mandible were studied with both panoramic radiography and computed tomography. Lesion shape and margin were evaluated on panoramic radiography, and bony expansion and cortical plate destruction were evaluated on computed tomography. In addition, a possible correlation among radiographic findings, histologic findings, and prognosis was investigated. Lesions found on panoramic radiography were classified into three types; each type pertained to two of the six patients. The lesion types were as follows: cystic, characterized by a large, cystic radiolucent area; rarefying, characterized by rarefying changes of the trabeculae; and infiltrative, characterized by a central ill-defined area of bony destruction. The results show that computed tomography is useful in the identification of tumor extent, bony expansion, and cortical plate destruction resulting from tumors. None of the patients whose lesions were of the cystic or rarefying type showed evidence of disease after surgery. In contrast, both of the patients whose lesions were of the infiltrative type died of their tumors. Histologic findings of the cystic and rarefying types showed tumors that were well-differentiated or moderately weil-differentiated, whereas findings of the infiltrative type showed poorly differentiated tumors. Radiographic findings correlated with histologic findings and prognosis of mucoepidermoid carcinoma in the mandible in this limited series.

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Submandibular gland duct endoscopy - Diagnostic value for salivary duct disorders in comparison to conventional radiography, sialography, and ultrasonography. Reviewed

K Yuasa, E Nakhyama, SG Ban, T Kawazu, T Chikui, M Shimizu, S Kanda

ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY AND ENDODONTICS 84 ( 5 ) 578 - 581 1997.11

Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Publisher：MOSBY-YEAR BOOK INC

The purpose of this study is to evaluate the usefulness of endoscopy as a procedure for the diagnosis of submandibular gland duct disorders. Endoscopy of the submandibular glands was performed on 12 patients with symptoms of obstructive sialoadenitis to identify the cause of obstruction. The endoscopic findings were then compared to those of diagnostic procedures such as conventional radiography, sialography, and ultrasonography. Six normal subjects also underwent endoscopy to better understand the normal findings of the duct system. Endoscopy demonstrated salivary gland calculus in 5 of 12 patients, which was revealed as filling defects on sialograms and as strongly echogenic structures on ultrasonograms in 4 of the patients. Endoscopy revealed secretion plugs, secretion plaques, and/or stenosis, which could not be seen by any other diagnostic procedures in 5 patients, as the cause of recurrent swelling in all 7 patients not demonstrating sialolith. Abnormal findings of the duct wall such as vasodilatation, fibrosis, edema, or erythema were seen in four patients, three of whom exhibited dilatation of the duct system on sialograms. In four patients, a decreasing internal echo level of the gland was seen on ultrasonograms. Our initial results for submandibular gland duct endoscopy thus appear to be promising.

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Differential diagnosis between Ameloblastoma and Odontogenic keratocyst using Neural Network

KAWAZU Toshiyuki, ARAKI Kazuyuki, YOSHIURA Kazunori, KANDA Shigenobu

37 96 - 96 1997.9

Dopplar ultrasonography of cervical lymph nodes : Change of findings depending on velocity scale

YUASA K., MIWA K., KAWAZU T., SHIMIZU M., NAKANO T., KAGE W., KANDA S.

37 90 - 90 1997.9

Differential Diagnosis between Ameloblastoma and Odontogenic Keratocyst using Computed Tomography

Toshiyuki KAWAZU, Kazuyuki ARAKI, Kazunori YOSHIURA, Kenji YUASA, Shigenobu KANDA, Yoshinori HIGUCHI, Satoru OHZEKI, Masanori SHINOHARA

Dental Radiology 37 ( 3 ) 211 - 218 1997

Differential Diagnosis between Ameloblastoma and Odontogenic Keratocyst using Computed Tomography

KAWAZU Toshiyuki, ARAKI Kazuyuki, YOSHIURA Kazunori, YUASA Kenji, KANDA Shigenobu, HIGUCHI Yoshinori, OHZEKI Satoru, SHINOHARA Masanori

37 ( 3 ) 211 - 218 1997

Study on the Computer-Assisted Image Diagnosis Using Neural Network : Diagnosis of the swelling at the parotid region

ARAKI Kazuyuki, YUASA Kenji, MIWA Kunihiro, YOSHIURA Kazunori, KAWAZU Toshiyuki, KANDA Shigenobu

36 41 - 41 1996.9

Construction of An Internet Film Conference System

TOKUMORI Kenji, YUASA Kenji, TANAKA Takemasa, KAWAZU Toshiyuki, KANDA Shigenobu, TOYOFUKU Fukai

36 128 - 128 1996.9

Imaging Diagnosis for Mass lesions of the Buccomasseteric region

YONETSU Koichi, YUASA Kenji, YOSHIURA Kazunori, CHIKUI Tohru, KAWAZU Toshiyuki, KANDA Shigenobu

36 119 - 119 1996.9

Cervical lymph nodes in oral cancer : CT and US findings

YUASA K., KAWAZU T., NAGATA T., MIWA K., YOSHIURA K., TABATA O., NAKAYAMA E., SHIMIZU M., BAN S., ARAKI K., CHIKUI T., GOTO T., INAGAKI M., KANDA S., SHINOHARA M., OZEKI S.

36 58 - 58 1996.9

Diagnostic accuracy of CT and US for cervical lymph node metastasis

KAWAZU T., YUASA K., NAGATA T., MIWA K., YOSHIURA K., TABATA O., NAKAYAMA E., SHIMIZU M., BAN S., ARAKI K., CHIKUI T., GOTO T., INAGAKI M., KANDA S., SHINOHARA M., OZEKI S.

36 59 - 59 1996.9

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