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Estimating Uncertainties of the Geometrical Range of particle Radiotherapy during Respiration
https://repo.qst.go.jp/records/43069
https://repo.qst.go.jp/records/43069296e9e49-afe0-494c-bedc-20adcc150cc9
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2003-04-15 | |||||
| タイトル | ||||||
| タイトル | Estimating Uncertainties of the Geometrical Range of particle Radiotherapy during Respiration | |||||
| 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 |
Minohara, Shinichi
× Minohara, Shinichi× Endo, Masahiro× Kanai, Tatsuaki× Katou, Hirotoshi× Tsujii, Hirohiko× 蓑原 伸一× 遠藤 真広× 金井 達明× 加藤 博敏× 辻井 博彦 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose: To propose a method for estimating uncertainties of the range calculation in particle radiotherapy associated with patient respiration. Methods and Materials: A set of sequential CT images at every 0.2 s was reconstructed from continuous X-ray projection data accumulated by dynamic helical scanning. At the same time that CT data was acquired, the respiratory signal of the patient and the X-ray on/off signal on CT scanner were recorded. Each CT image was timed according to the phase of respiration waveform. Conversion of the CT number to the water equivalent path length (WEL) was performed with our treatment planning system that included a conversion table. As an illustration, the CT images of a patient with liver cancer at the right upper lobe were analyzed. The geometric size of the liver and WELs from body surface to isocenter were measured in each CT image. Results: Variations of WEL from body surface to isocenter at the anterior-posterior and posterior-anterior direction were 6.2 mm and 18.9 mm, respectively. Liver size changed by 35.2 mm. However, these variations were shown to be considerably reduced by gated irradiation. Conclusion: A method using sequential CT images with respiration waveform was proposed. It appeared to be useful in evaluating the uncertainties of the range calculation associated with patient breathing. |
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| 書誌情報 |
International Journal of Radiation Oncology Biology Physics 巻 56, 号 1, p. 121-125, 発行日 2003-05 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0360-3016 | |||||
