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Effect of patient positioning on carbon-ion therapy planned dose distribution to pancreatic tumors and organs at risk
https://repo.qst.go.jp/records/48093
https://repo.qst.go.jp/records/480933e90e5c5-0df5-46b1-a4e4-c21d0c6e798e
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-07-13 | |||||
| タイトル | ||||||
| タイトル | Effect of patient positioning on carbon-ion therapy planned dose distribution to pancreatic tumors and organs at risk | |||||
| 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 |
三木, 健太朗
× 三木, 健太朗× 深堀, 麻衣× 熊谷, 始紀× 山田, 滋× 森, 慎一郎× 三木 健太朗× 深堀 麻衣× 熊谷 始紀× 山田 滋× 森 慎一郎 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose Pancreatic tumor treatment dose distribution variations associated with supine and prone patient positioning were evaluated. \nMethods A total of 33 patients with pancreatic tumors who underwent CT in the supine and prone positions were analyzed retrospectively. Gross tumor volume (GTV), planning target volume (PTV), and organs at risk (OARs) (duodenum and stomach) were contoured. The prescribed dose of 55.2 Gy (RBE) was planned from four beam angles (0°, 90°, 180°, and 270°). Patient collimator and compensating boli were designed for each field. Dose distributions were calculated for each field in the supine and prone positions. To improve dose distribution, patient positioning was selected from supine or prone for each beam field. \nResults Compared with conventional beam angle and patient positioning, D2cc of 1st-2nd portion of duodenum (D1-D2), 3rd-4th portion of duodenum (D3-D4), and stomach could be reduced to a maximum of 6.4 Gy (RBE), 3.5 Gy (RBE), and 4.5 Gy (RBE) by selection of patient positioning. V10 of D1-D2, D3-D4, and stomach could be reduced to a maximum of 7.2 cc, 11.3 cc, and 11.5 cc, respectively. D95 of GTV and PTV were improved to a maximum of 6.9% and 3.7% of the prescribed dose, respectively. \nConclusions Optimization of patient positioning for each beam angle in treatment planning has the potential to reduce OARs dose maintaining tumor dose in pancreatic treatment. |
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| 書誌情報 |
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB) 巻 33, p. 38-46, 発行日 2016-12 |
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| 出版者 | ||||||
| 出版者 | Istituti Editoriali e Poligrafici Internazionali | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1120-1797 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.ejmp.2016.12.001 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.physicamedica.com/article/S1120-1797(16)31100-0/fulltext | |||||
| 関連名称 | http://www.physicamedica.com/article/S1120-1797(16)31100-0/fulltext | |||||
