書誌事項
- タイトル別名
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- Estimation of Exposure Dose from CBCT for Prostate IMRT and Approach to Reduce Local Exposure Dose
- ゼンリツセン IMRT ニ モチイル CBCT ノ センリョウ ヒョウカ ト キョクショ ヒバクテイゲン ノ タイサク
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Intensity modulated radiation therapy (IMRT) requires a precise set-up for which 3D matching using cone beam computed tomography (CBCT) is useful. Because images are acquired before every irradiation, investigating the exposure dose is essential. Such studies have been reported, but fewer reports have attempted to compare the dose with those in other modalities, as we did in this study. The exposure doses for imaging using 3 devices, including on board imager(OBI) CBCT, were measured using a tough water phantom, a self-made phantom, and a radiophotoluminescence glass dosimeter. The highest measured value was observed on OBI CBCT: the exposure dose was 4.3 times higher at some measurement sites than that from CT. Because this phenomenon is derived from the projection angle, a localized increase in the exposure dose may be prevented by changing the projection angle on each acquisition. Because the exposure dose for OBI CBCT was the highest and acquisition is performed before every irradiation, procedural modification is necessary, such as minimizing acquisition and the use of ultrasonography to confirm urine retention.
収録刊行物
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- 日本放射線技術学会雑誌
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日本放射線技術学会雑誌 67 (3), 183-192, 2011
公益社団法人 日本放射線技術学会
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詳細情報 詳細情報について
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- CRID
- 1390001206362028800
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- NII論文ID
- 10027963483
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- NII書誌ID
- AN00197784
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- ISSN
- 18814883
- 03694305
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- NDL書誌ID
- 11055355
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可