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小澤 良之オザワ ヨシユキ

所属部署医学研究科放射線医学分野
職名准教授
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Last Updated :2020/07/02

研究者基本情報

学位

  • 名古屋市立大学大学院大学院医学研究科生体防御・総合医学 博士課程/生体防御・総合医学 博士(医学)

所属学協会

  • 日本肺癌学会
  • 日本IVR学会
  • 日本医学放射線学会
  • 日本核医学会
  • 日本磁気共鳴医学会
  • 日本胸腺研究会

研究活動情報

研究分野

  • ライフサイエンス, 放射線科学

研究キーワード

    肺癌, 肺機能, CT, 画像診断, 縦隔腫瘍

MISC

  • 肺癌取り扱い規約(第7版)を用いた病期診断におけるHigh‐Definition PET Reconstruction(HD‐PET)と従来法との比較, 小澤良之, 伊藤雅人, 河合辰哉, 中川基生, 小川正樹, 太田賢吾, 芝本雄太, 原眞咲, Japanese Journal of Radiology, 31,   2013年02月25日
  • Dual-energy CT Can Evaluate Both Hilar and Mediastinal Lymph Nodes and Lesion Vascularity with a Single Scan at 60 Seconds after Contrast Medium Injection, Masaki Ogawa, Masaki Hara, Ayano Lmafuji, Yoshiyuki Ozawa, Toshinao Arakawa, Susumu Kobayashi, Yuta Shibamoto, ACADEMIC RADIOLOGY, 19, (8) 1003 - 1010,   2012年08月, Rationale and Objectives: The aim of this study was to investigate whether 80-kVp and weighted-average 120-kVp computed tomographic (CT) images scanned at 60 seconds after contrast material injection using a dual-source CT scanner could substitute for conventional 120-kVp images obtained at 30 and 100 seconds. Materials and Methods: Eighty-three consecutive patients with suspected lung cancer were enrolled. Images were obtained in dual-energy mode (80 and 140 kVp) at 60 seconds and conventional 120-kVp mode at 30 and 100 seconds after contrast injection. The CT numbers of the pulmonary artery, pulmonary vein, hilar zone lymph nodes, and pulmonary lesions were measured. Contrasts between, the pulmonary artery/pulmonary vein and lymph nodes and beam-hardening artifacts were visually evaluated using five-point and four-point scales, respectively. The degree of enhancement was evaluated on 30-second 120-kVp, 100-second 120-kVp, and 60-second weighted-average 120-kVp images. Results: The mean differences in attenuation between the pulmonary artery/pulmonary vein and lymph nodes on the 30-second 120-kVp, 60-second 80-kVp, and 60-second weighted-average 120-kVp images were 184/155, 130/140, and 84/92 Hounsfield units, respectively (all P values <.001). The mean contrast scores for the hilar/mediastinal lymph nodes were 4.5/4.7, 3.7/4.2, 3.3/3.6, and 2.4/2.5 for these three and for 100-second 120-kVp images, respectively (all P values <.01). The mean artifact scores of the four images were 1.2, 3.4, 3.6, and 4.0, respectively. On 60-second weighted-average 120-kVp images, 55 of 60 lesions (92%) showed higher enhancement than on 100-second conventional 120-kVp images. Conclusions: Dual-energy CT images scanned 60 seconds after contrast injection show excellent vessel-lymph node contrast and enhancement of lesions and can replace dual-phase scan protocols.
  • 心電図同期併用Dual‐Source CTにて術前診断できたdual left anterior descending artery(dual LAD)の1例, 新図寛子, 河合辰哉, 櫛田綾乃, 中川基生, 櫻井圭太, 小澤良之, 芝本雄太, 原眞咲, Japanese Journal of Radiology, 29,   2011年01月25日
  • Dual source CTを用いたDual Energy肺Perrusion CTの肺塞栓診断能の評価, 中川基生, 原眞咲, 櫻井圭太, 河合辰哉, 小澤良之, 武藤昌裕, 櫛田綾乃, 芝本雄太, 日本医学放射線学会秋季臨床大会抄録集, 44th,   2008年09月24日

講演・口頭発表等

  • Utility of monoenergetic imaging for differentiating the mediastinal tumors, Ozawa Y, Hara M, Shibamoto Y, The 4th Asian Congress of Thoracic Imaging,   2019年07月05日
  • Optimization of scan delay on the routine chest contrast enhanced CT, 2nd world congress thoracic imaging and diagnosis in chest disease,   2009年
  • Usefulness of electrocardiographically gated CT for diagnosing mediastinal tumors using dual source CT, The 4th joint meeting of Japanese-Korean societies of thoracic radiology,   2008年
  • CT-pathologic correlation of invasive thymomas, The 3rd joint meeting of Japanese-Korean societies of thoracic radiology,   2007年
  • The Diagnostic Accuracy of FDG-PET for pN2 Lymph Nodes in Patients with Lung Cancer, RSNA,   2006年
  • Cystic lesions in the anterior mediastinum: what radiologists should know, Ozawa Y, Hara M, Shibamoto Y, European Congress of Radiology, February 27-March 3, 2019,
  • Imaging findings of thoracic cavitating and cystic lesions, Ozawa Y, Hara M, Nakagawa M, Sekiguchi T, Shibamoto Y, 4th World Congress of Thoracic Imaging
  • Advanced virtual monoenergetic images of pulmonary artery enhancement with low keV settings: Comparison with low kV image, Ozawa Y, Nakagawa M, Hara M, Ogawa M, Shibamoto Y, European Congress of Radiology


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