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Impact of different Ir-192 source models on dose calculations in high-dose-rate brachytherapy. 2018
Yuki Otani, and
Shigetoshi Shimamoto, and
Iori Sumida, and
Yutaka Takahashi, and
Shoji Tani, and
Tetsuya Oshima, and
Satoshi Onosaka, and
Fumiaki Isohashi, and
Keisuke Tamari, and
Kazuhiko Ogawa
Department of Radiology, Kaizuka City Hospital, Japan.
In high-dose-rate brachytherapy, the geometry of the radioactive source is sometimes updated. Some institutions use a different source model for the dose calculation in treatment planning and treatment. The effects of this discrepancy were examined for four types of treatment plans, and ten patients were selected for each treatment plan. The impact of different source models depended on the types of treatment plan, patients, and dose index. To reduce the uncertainty and improve the reliability of the data, it would be better to use more robust metrics (D90 and D2cc) for treatment planning evaluation in facilities with this problem.
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