@inproceedings{oai:repo.qst.go.jp:00053130,
 author = {蓑原, 伸一 and 蓑原 伸一},
 book = {粒子線治療の基盤展開 : その普及に向けて（放医研シンポジウムシリーズ . 重粒子医科学センターシンポジウム ; 第１回）},
 issue = {NIRS-M-156},
 month = {Mar},
 note = {To improve the accuracy of patient positioning, two medical imaging modalities were compared. One was a fluoroscopy (x ray TV) image, which has been using the patient positioning at HIMAC routinely. The x ray TV method was based on the comparison of anatomical bone structure between the reference image and the positioning image. However the identification of organ position from x ray TV image was difficult. Therefore this method did not directly detect the inter fraction organ motion. Another modality was CT image. The CT image for positioning was directly compared to treatment planning CT images and was easy to identify the inter fraction organ motion. In our study of CT positioning it was possible to detect three dimensional positioning error in high precision. But CT scanner was so large that the beam port nozzle interfered with CT scanner. In this paper we mentioned the present x ray TV positioning at HIMAC, and considered merits and demerit of CT positioning.},
 pages = {98--102},
 publisher = {放医研},
 title = {患者位置決め技術−X線投影画像とCT画像},
 year = {2002}
}