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Design of a Compensating Bolus by Use of Exhalation CT Data for Covering Residual Motion in Respiratory-Gated Charged-Particle Lung Therapy: Four-Dimensional Carbon Beam Dose Calculation
https://repo.qst.go.jp/records/45070
https://repo.qst.go.jp/records/45070ef64c810-d850-4410-b388-d7e15e2ead52
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-01-08 | |||||
| タイトル | ||||||
| タイトル | Design of a Compensating Bolus by Use of Exhalation CT Data for Covering Residual Motion in Respiratory-Gated Charged-Particle Lung Therapy: Four-Dimensional Carbon Beam Dose Calculation | |||||
| 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× Asakura, Hiroshi× Yashiro, Tomoyasu× Kumagai, Motoki× Kandatsu, Susumu× Baba, Masayuki× Endo, Masahiro× et.al× 森 慎一郎× 矢代 智康× 熊谷 始紀× 神立 進× 馬場 雅行× 遠藤 真広 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We developed an algorithm which we used to design a compensating bolus by using respiratory-gated CT data for respiratory-gated carbon beam lung therapy and evaluated it by calculating dose distributions as a function of time. Four-dimensional CT (4DCT) images were obtained for seven lung cancer patients under free breathing conditions. The internal target volume (ITV) was calculated by maximum intensity projection processing which use of three types of gross tumor volumes (GTVs): at peak exhalation and with a 5 mm shift of the GTV to both superior and inferior sides. Then a compensating bolus was designed which use of the ITV and applied to 4DCT data at the gating window (around exhalation phase). The carbon beam distribution was calculated by a pencil-beam algorithm as a function of time. The compensating bolus provides a sufficient prescribed dose to the target in the gating window and minimizes any excessive dose to the normal tissues. The metric of dosimetric assessment metrics of D95 in all patients is greater than 96% of the prescribed dose in the gating window. Our results will be beneficial for improving the accuracy of charged-particle radiotherapy for hospitals where 4DCT cannot be used. | |||||
| 書誌情報 |
Radiological Physics and Technology 巻 1, 号 1, p. 83-88, 発行日 2007-11 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1865-0333 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1007/s12194-007-0012-z | |||||
