@article{oai:tokyo-metro-u.repo.nii.ac.jp:00004261,
 author = {イマエ, トシカズ and シノハラ, ヒロユキ and イノ, ケンジ 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 ヤノ, ケイイチ and キダ, サトシ and ハガ, アキヒロ and ナカガワ, ケイイチ and オオトモ, クニ and Imae, Toshikazu and Shinohara, Hiroyuki and Ino, Kenji and Okano, Yukari and Sasaki, Katsutake and Saegusa, Shigeki and Shiraki, Takashi and Yano, Keiichi and Kida, Satoshi and Haga, Akihiro and Nakagawa, Keiichi and Otomo, Kuni and 今江, 禄一 and 篠原, 広行 and 井野, 賢司 and 岡野, 由香里 and 佐々木, 克剛 and 三枝, 茂輝 and 白木, 尚 and 矢野, 敬一 and 木田, 智士 and 芳賀, 昭弘 and 中川, 恵一 and 大友, 邦},
 issue = {2},
 journal = {日本放射線技術学会雑誌},
 month = {Feb},
 note = {Volumetric modulated arc therapy (VMAT) is a rotational intensity-modulated radiotherapy (IMRT)
technique capable of acquiring projection images for cone-beam computed tomography (CBCT). Respiratorycorrelated
cone-beam computed tomography, namely 4D-CBCT, serves to assess the displacement of a tumor
position between planning and treatment due to organ motion and respiration, and is important for more accurate
radiation therapy. On the other hand, recently, a 320-detector row CT scanner, namely 4D-CT, has
become available that allows axial volumetric scanning of a 16-cm-long range in a patient without table
movement. The goal of our research is to establish a new method of verification during treatment in stereotactic
body radiotherapy. In this study, we compare the movement of the tumor between “before treatment” using
4D-CT and “in treatment” using 4D-CBCT. Three patients (55–68 years of age) with lung tumors underwent
CT scans for radiotherapy planning using 4D-CT scans to analyze the movement of the tumor before treatment.
The patients were treated by VMAT while acquiring projection images. 4D-CBCT datasets were reconstructed
from the projection images using in-house programs. The tumor positions in 4D-CT and 4D-CBCT
were detected and the movement of the tumor between “before treatment” and “in treatment” was similar. The
movement of the tumors during treatment was predictable from 4D-CT before treatment. Furthermore,
4D-CBCT clarified the tumor position during treatment and could reevaluate the actual tumor position and
dose distribution. We have successfully shown the movement of the tumor between “before treatment” using
4D-CT and “in treatment” using 4D-CBCT., Article},
 pages = {153--161},
 title = {回転型強度変調法を用いた肺定位放射線治療中における標的の軌跡解析},
 volume = {68},
 year = {2012}
}