医療科学部

鈴木 昇一

suzuki shoichi

基本情報

所属
藤田保健衛生大学 医療科学部 放射線学科 診療放射線技術学Ⅳ 教授
学位
博士(医学)

J-GLOBAL ID
200901019007933658
researchmap会員ID
1000102716

MISC

 35
  • Y. Asada, S. Suzuki, K. Minami, S. Shirakawa
    JOURNAL OF RADIOLOGICAL PROTECTION 34(1) 125-132 2014年3月  査読有り
    Diagnostic reference levels (DRLs) for mammography have yet to be created in Japan. A national questionnaire investigation into radiographic conditions in Japan was carried out for the purpose of creating DRLs. Items investigated included the following: tube voltage; tube current; current-time product; source-image distance; craniocaudal view; automatic exposure control (AEC) settings; name of mammography unit; image receptor system (computed radiography (CR), flat panel detector (FPD), or film/screen (F/S)); and supported or unsupported monitor diagnosis (including monitor resolution). Estimation of the mean glandular dose (MGD) for mammography was performed and compared with previous investigations. The MGD was 1.58(0.48) mGy, which did not significantly differ from a 2007 investigation. In relation to image receptors, although no difference in average MGD values was observed between CR and FPD systems, F/S systems had a significantly decreased value compared to both CR and FPDs. Concerning digital systems (FPDs), the MGD value of the direct conversion system was significantly higher than the indirect conversion system. No significant difference in MGD value was evident concerning type of monitor diagnosis for either the CR or the FPD digital systems; however, hard copies were used more often in CR. No significant difference in the MGD value was found in relation to monitor resolution. This report suggests ways to lower the doses patients undergoing mammography receive in Japan, and serves as reference data for 4.2 cm compressed breast tissue of 50% composition DRLs. Furthermore, our findings suggest that further optimisation of FPD settings can promote a reduction in the MGD value.
  • 松永雄太, 川口愛, 小林謙一, 浅田恭生, 滝川幸則, 山田雅己, 鈴木昇一
    日放技学誌 69(12) 1372-1378 2014年  査読有り
  • 竹井 泰孝, 鈴木 昇一, 宮嵜 治, 松原 孝祐, 村松 禎久, 島田 義也, 赤羽 恵一, 藤井 啓輔
    日放技学誌 70(6) 562-568 2014年  査読有り
  • Ai Kawaguchi, Yuta Matsunaga, Tomoko Otsuka, Shoichi Suzuki
    Radiological Physics and Technology 7(1) 102-108 2014年  査読有り
    Our aim in this study was to investigate the incident air kerma (IAK) and average glandular dose (AGD) for polymethylmethacrylate (PMMA) phantoms and patient breasts for each thickness by use of digital mammography units, and to determine the correlation between phantom and patient measurements. An additional aim was to calculate the numerical value of the diagnostic reference level (DRL) for digital mammography in Japan based on the AGD from patient measurements. Patient-based IAK and AGD values were calculated for 300 patients who underwent mammographic examinations at three institutions. On examination of a 40-mm PMMA phantom, the IAK and the AGD were 7.89 and 1.84 mGy, respectively. The mean patient breast thickness was 37.6 mm, and the mean IAK and the AGD calculated from actual patient data for breast thicknesses between 40 mm and 50 mm were 8.91 and 2.08 mGy, respectively. Approximately 20% of the 300 patients had IAK &gt 10 mGy. The distributions of patient-based IAK and AGD values were higher than the IAK and AGD values for the PMMA phantom. The patient dose with use of the PMMA phantom can be underestimated. The DRL was calculated from patient-based AGDs of the regular breast thickness as 2.0 mGy in Japan. © Japanese Society of Radiological Technology and Japan Society of Medical Physics 2013.
  • Naoki Takayanagi, Hidehiko Beppu, Kenmei Mizutani, Yutaka Tomita, Shizuko Nagao, Shoichi Suzuki, Abbas Orand, Hisahide Takahashi, Shigeru Sonoda
    JOURNAL OF NEUROSCIENCE METHODS 219(1) 162-168 2013年9月  査読有り
    Background: Although different gait analysis methods such as Walking Track Analysis exist, they cannot be used to demonstrate the physical condition of mice with specific gait disorder characteristic. Therefore, we developed a new method for the gait analysis of such mice to accurately assess hind limb angle based on the pelvic axis. New method: We established and verified a gait analysis method capable of pelvic axis-based limb angle measurement by video-recording the gait of a control mice group (C57BL/6J(B6)) and three ataxic mice (ataxic B6-wob/t, Parkinson's disease model (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine treated (MPTP)), and cerebellum hypoplasia (cytosine-beta-D-arabinofuranoside treated)) from the ventral side. Results: The assessed hind limb angles of B6-wob/t and MPTP-treated mice were significantly wider than B6 mice (p<0.01). Moreover, we could draw separating lines with slopes of minus one that could separate the data of each group in-the scatter plot of the normalized hind limb step width and angle. Comparison with existing methods: We found no significance when we applied the already existing nose-tail method for the analysis of the hind limb angles of B6 and B6-woblt mice. In the nose-tail method, since the whole body axis of the trunk varies while the trunk of the mouse is laterally bent changing the hind limb angle, B6 and B6-wob/t mice could not be differentiated. However, the two mice groups could be differentiated by the pelvic axis-based gait analysis method. Conclusion: The pelvic axis-based gait analysis method is promising and valid for mice with gait disorder. (C) 2013 Elsevier B.V. All rights reserved.

講演・口頭発表等

 64

教育内容・方法の工夫(授業評価等を含む)

 1
  • 件名
    選択科目;施設設計学(3年後期)
    開始年月日
    2011/10
    概要
    講義中心に加え、計算演習、グループ討議、大学実験室での遮蔽効果の検証を少人数で行い、実作と計算、法令との関係を実践をとおして授業を行っている。

作成した教科書、教材、参考書

 1
  • 件名
    放射線技術学シリーズ 放射線安全管理学(第二版)
    終了年月日
    2012/09
    概要
    日本放射線技術学会監修 西谷源展・鈴木昇一 共編(初版2005-2013年9月第2版4刷) 教科書として利用