書誌事項
- タイトル別名
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- Evaluation of Absorbed Dose from Kilovoltage Cone-beam Computed Tomography by Radiotherapy Planning System: Influence on the Radiation Therapy for Prostate Cancer
- ホウシャセン チリョウ ケイカク ソウチ オ モチイタ kV-CBCT キュウシュウセンリョウ ヒョウカ : ゼンリツセン ガン ホウシャセン チリョウ ニ オヨボス エイキョウ
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Image-guided radiation therapy (IGRT) is increasingly being used in modern radiation therapy, and it is now possible to verify a patient’s position using kilo-voltage cone-beam computed tomography (kV-CBCT). However, if kV-CBCT is used frequently, the dose absorbed by the body cannot be disregarded. A number of studies have been made on the absorbed dose of kV-CBCT, in which absorbed dose measurements were made using a computed tomography dose index (CTDI) or a thermoluminescent dosimeter (TLD). Other methods include comparison of the absorbed dose between a kV-CBCT and other modalities. These techniques are now in common use. However, dose distribution within the patient varies with the patient’s size, posture and the part of the body to which radiation therapy is applied. The chief purpose of this study was to evaluate the dose distribution of kV-CBCT by employing a radiotherapy planning system (RTPS); a secondary aim was to examine the influence of a dose of kV-CBCT radiation when used to treat prostate cancer. The beam data of an on-board imager (OBI) was registered in the RTPS, after which modeling was performed. The radiation dosimetry was arranged by the dosimeter in an elliptical phantom. Rotational radiation treatment was used to obtain the dose distribution of the kV-CBCT within the patient, and the patient dose was evaluated based on the simulation of the dose distribution. In radiation therapy for prostate cancer, if kV-CBCT was applied daily, the dose increment within the planning target volume (PTV) and the organ in question was about 1 Gy.
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 69 (5), 491-499, 2013
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
- 1390282681338770432
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- NII論文ID
- 10031159475
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- NII書誌ID
- AN00197784
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- COI
- 1:CAS:528:DC%2BC3sXhtVShtbjN
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- ISSN
- 18814883
- 03694305
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- NDL書誌ID
- 024678016
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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
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- 使用不可