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動画対応フラットパネルディテクタによる肺機能画像診断法 : 肺シンチグラフィ所見との比較 Pulmonary functional diagnostic imaging using a dynamic flat-panel detector: comparison with findings in pulmonary scintigraphy Tanaka, Rie Sanada, Shigeru Fujimura, Masaki Yasui, Masahide Tsuji, Shiro Hayashi, Norio Nanbu, Yuko Matsui, Osamu 40361985 田中, 利恵 50020029 真田, 茂 90190066 藤村, 政樹 安井, 正英 辻, 志郎 林, 則夫 南部, 裕子 10019961 松井, 修 Pulmonary ventilation and circulation dynamics are reflected on dynamic chest radiographs as changes in X-ray translucency,i.e., pixel values. The present study was performed to develop a pulmonary functional evaluation method based on the changes in pixel value, and to investigate the clinical usefulness of our method. Sequential chest radiographs of 20 subjects (abnormal,n=12; normal,n=8) during respiration were obtained with a dynamic flat-panel detector (FPD) system. The average pixel value in each local area was measured tracking the same area. To facilitate visual evaluation, the results were mapped on the original image using a grayscale in which small changes were shown in black and large changes were shown in white. In our clinical evaluation in comparison with a pulmonary scintigraphy, pulmonary ventilation disorder was indicated as a reduction of changes in pixel values. In many patients, there was a correlation between our result and a pulmonary scintigraphy (0.7<r, 4 cases; 0.4<r<or=0.7, 6 cases; 0.2<r<or=0.4, 1 case; 0<r<or=0.2, 1 case). The present method with real-time computer analysis is expected to be a rapid and simple method for evaluating pulmonary function and as an additional examination in conventional chest radiography. 金沢大学医薬保健研究域保健学系 日本放射線技術学会 = JSRT : Japanese Society of Radiological Technology 2009-06-20 2017-10-03 jpn journal article AM https://doi.org/10.24517/00014723 http://hdl.handle.net/2297/19430 https://kanazawa-u.repo.nii.ac.jp/records/14736 10.24517/00014723 http://www.jstage.jst.go.jp/article/jjrt/65/6/728/_pdf AN00197784 0369-4305 Japanese journal of Radiological Technology = 日本放射線技術學會誌 / Nippon Hoshasen Gijutsu Gakkai zasshi 65 6 728 737 https://kanazawa-u.repo.nii.ac.jp/record/14736/files/ME-PR-TANAKA-R-728.pdf application/pdf 1.0 MB 2017-10-03