WEKO3
アイテム
Physical evaluation of CT scan methods for radiation therapy planning: Comparison of fast, slow and gating scan using the 256-detector row CT scanner
https://repo.qst.go.jp/records/44698
https://repo.qst.go.jp/records/446984dc0737b-bce9-46da-bfbf-077ea3ce2732
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-11-06 | |||||
| タイトル | ||||||
| タイトル | Physical evaluation of CT scan methods for radiation therapy planning: Comparison of fast, slow and gating scan using the 256-detector row CT scanner | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mori, Shinichiro
× Mori, Shinichiro× Kanematsu, Nobuyuki× Mizuno, Hideyuki× Sunaoka, Masayoshi× Endo, Masahiro× 森 慎一郎× 兼松 伸幸× 水野 秀之× 砂岡 正良× 遠藤 真広 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Although slow-rotation CT scanning (slow-scan CT: SSCT) has been used for radiation therapy planning, based on the rationale that average duration of the human respiratory cycle is 4 s, a number of physical and quantitative questions require answering before it can be adopted for clinical use. This study was performed to evaluate SSCT physically in comparison with other scan methods, including respiratory-gated CT (RGCT), and to develop procedures to improve treatment accuracy. Evaluation items were geometrical accuracy, volume accuracy, water equivalent length, and dose distribution using the 256-detector row CT with three scan methods. Fast-scan CT (FSCT) was defined as the obtaining of all respiratory phases in cine scan mode at 1.0 s per rotation. FSCT-ave was the averaged FSCT images in all respiratory phases, obtained by reconstructing short time intervals. SSCT has been defined as scanning with slow gantry rotation to capture the whole respiratory cycle in one rotation. RGCT was scanned at the most stable point in the respiratory cycle, which provides the same image as that by FSCT at the most stable point. Results showed that all evaluation items were dependent on motion characteristics. The findings of this study indicate that 3D planning based solely on SSCT under free breathing may result in underdosing of the target volume and increase toxicity to surrounding normal tissues. Of the three methods, RGCT showed the best ability to significantly increase the accuracy of dose distribution, and provided more information to minimize the margins. FSCT-ave is a satisfactory radiotherapy planning alternative if RGCT is not available. | |||||
| 書誌情報 |
Physics in Medicine and Biology 巻 51, 号 3, p. 587-600, 発行日 2006-01 |
|||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0031-9155 | |||||
