タイトル | A method for calculating absorbed dose in tissue by Cs-137 needle using EGS4 |
その他のタイトル | EGS4を用いたCs-137鉛筆ビームに対する吸収線量の計算法 |
著者(日) | 霜村 康平; 田伏 勝義; 青山 裕一 |
著者(英) | Shimomura, Kohei; Tabushi, Katsuyoshi; Aoyama, Yuichi |
著者所属(日) | 名古屋大学 医学部 保健学科; 名古屋大学 医学部 保健学科; 名古屋大学 医学部 保健学科 |
著者所属(英) | Nagoya University School of Health Sciences, Faculty of Medicine; Nagoya University School of Health Sciences, Faculty of Medicine; Nagoya University School of Health Sciences, Faculty of Medicine |
発行日 | 2004-02 |
刊行物名 | Proceedings of the Eleventh EGS4 Users' Meeting in Japan Proceedings of the Eleventh EGS4 Users' Meeting in Japan |
開始ページ | 65 |
終了ページ | 73 |
刊行年月日 | 2004-02 |
言語 | eng |
抄録 | A method using dose rate constant and anisotropy function for calculating absorbed dose distribution in brachytherapy has been recommended by AAPM Report no.51. In 2003, the radiation treatment planning equipment with the method for obtaining the absorbed dose distribution in brachytherapy using Cs-137 needles was introduced into Department of Radiology, Nagoya University Hospital. The method beforehand requires radial dose functions g(r) and anisotropy functions F(r, theta). These functions are decided from known absorbed dose. However, it is difficult technologically to measure the absorbed dose distribution in the vicinity of the Cs-137 needle for brachytherapy. Therefore, these functions were obtained after the absorbed dose distribution had been calculated using a conventional method. The absorbed dose distribution calculated by the conventional method must be compared with the measurement one. In order to verify the accuracy of this method, the absorbed dose distribution obtained with this method and that obtained was compared with EGS4 Monte Carlo simulation. Furthermore, the influence of the geometry of the needle source to the absorbed dose distribution was examined. As a result, both absorbed dose distributions obtained by two methods were good agreement with each other. In addition, there was little influence to the dose distribution on the basis of a difference of the geometry on both ends of the needle. |
キーワード | EGS4; Cs-137 source; water phantom; absorbed dose distribution; brachytherapy; Monte Carlo simulation; radiation dosage; radiation therapy; EGS4; Cs-137線源; 水ファントム; 吸収線量分布; 近接照射療法; モンテカルロシミュレーション; 放射線量; 放射線治療 |
資料種別 | Conference Paper |
SHI-NO | AA0046541011 |
レポートNO | KEK-Proceedings-2003-15 |
URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/57110 |