@article{oai:tokyo-metro-u.repo.nii.ac.jp:00004254,
 author = {イマエ, トシカズ and ハガ, アキヒコ and ナカガワ, ケイイチ and イノ, ケンジ and タナカ, ケンイチロウ and オカノ, ユカリ and ササキ, カツタケ and サエグサ, シゲキ and シラキ, タカシ and オリタテ, タカシ and ヤノ, ケイイチ and シノハラ, ヒロユキ and Imae, Toshikazu and Haga, Akihiro and Nakagawa, Keiichi and Ino, Kenji and Tanaka, Kenichirou and Okano, Yukari and Sasaki, Katsutake and Saegusa, Shigeki and Shiraki, Takashi and Oritate, Takashi and Yano, Keiichi and Shinohara, Hiroyuki and 今江, 禄一 and 芳賀, 昭弘 and 中川, 恵一 and 井野, 賢司 and 田中, 堅一郎 and 岡野, 由香里 and 佐々木, 克剛 and 三枝, 茂輝 and 白木, 尚 and 折舘, 隆 and 矢野, 敬一 and 篠原, 広行},
 issue = {3},
 journal = {日本放射線技術学会雑誌},
 month = {Mar},
 note = {Multi-detector computed tomography (MDCT) has rapidly evolved and is increasingly used for treatment simulation of thoracic and abdominal radiotherapy. A 320-detector row CT scanner has recently become available that allows axial volumetric scanning of a 16-cm-long range in a patient without table movement. Current radiotherapy techniques require a generous margin around the presumed gross tumor volume (GTV) to account for uncertainties such as tumor motion and set up error. Motion analysis is useful to evaluate the internal margin of a moving target due to respiration and to improve therapeutic precision. The purpose of this study is to propose a method using phase-only correlation to automatically detect the target and to assess the motion of the target in numerical phantoms and patients. Free-breathing scans using 320-detector row CT were acquired for 4 patients with lung tumor(s). The proposed method was feasible for motion analysis of all numerical phantoms and patients. The results reproduced the facts that the motion of tumors in the patients varied in orbits during the respiratory cycle and exhibited hysteresis. The maximum distance between peak exhalation and inhalation increased as the tumors approached the diaphragm. The proposed method detected the three-dimensional position of the targets automatically and analyzed the trajectories. The tumor motion due to respiration differed by region and was greatest for the lower lobe.},
 pages = {202--211},
 title = {320列CT装置を用いた肺定位放射線治療における標的の軌跡解析},
 volume = {67},
 year = {2011}
}