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アイテム
INCORPORATING ORGAN MOTION UNCERTAINTIES INTO CARBON ION TREATMENT PLANNING
https://repo.qst.go.jp/records/67987
https://repo.qst.go.jp/records/6798762ee7b26-29ab-4d14-aa25-08d37a560213
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2004-12-17 | |||||
| タイトル | ||||||
| タイトル | INCORPORATING ORGAN MOTION UNCERTAINTIES INTO CARBON ION TREATMENT PLANNING | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
Koyama-Ito, Hiroko
× Koyama-Ito, Hiroko× et.al× 伊藤 浩子 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | <Purpose> This study reports and evaluates treatment planning including organ motion uncertainties for three-dimensional conformal therapy of lung cancer with respiration gated carbon ion broad beams. The distal margins were added by radiological path length. <Materials and Methods> During treatment a patient is irradiated while the respiration signal from monitor placed on patient skin is close to end expiration phase of free breathing. Planning CT scans are taken gated with the same signal. To the CTV delineated on planning CT slices, margins for uncertainties in tumor movements are added based on fluoroscopy examinations typically 10 mm in cranial and 5 mm in caudal direction. The range compensator (RC) is designed for PTV that includes these margins under the assumption that the lung including tumor moves in cranial-caudal (CC) direction sliding along the chest wall. <Results> Dose distributions are calculated for different tumor locations. Within the model of lung motion, CTV dose coverage is observed although the irradiated lung volume increases in enhanced degree due to the low electron density of lung. <Discussions> The uncertainties in tumor motion are determined from clinical experience in fluoroscopy observations prior to irradiations. In order to reduce motion margins further, more accurate tumor position monitor is required. The effect of chest wall movement remains for future study with 4-D CT. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 4th Shinji Takahashi Memorial International Workshop on 3D-CRT | |||||
| 発表年月日 | ||||||
| 日付 | 2004-12-12 | |||||
| 日付タイプ | Issued | |||||
