Use of IAEA's phase-space files for the implementation of a clinical accelerator virtual source model
Use of IAEA's phase-space files for the implementation of a clinical accelerator virtual source model
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DOI：
10.1016/j.ejmp.2013.07.127
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发表时间：
2014-03-01
影响因子：
3.4
通讯作者：
Strbac, Bojan
中科院分区：
文献类型：
--
作者：
Rucci, Alexis;Carletti, Claudia;Strbac, Bojan
本文利用国际原子能机构(IAEA)为不同加速器提供的相空间数据文件(Phsp)，建立了临床光子束的虚拟源模型(VSM)。从提供的phsp文件中提取的光谱能量分布被用来定义混合模型中的虚拟扩展源的辐射模式，该混合模型包括用于模拟电子污染和半影区形状的虚拟光圈。这个简单的虚拟模型被用作水模剂量学计算的辐射源。实验证明，该模型易于建立和测试，并与临床加速器剂量学测量结果吻合较好。我们的结果表明，这种简单的方法可以用于治疗计划系统(TPS)的验证目的。(C)2013年意大利菲西卡医学协会。爱思唯尔有限公司出版。保留所有权利。
In the present work, phase-space data files (phsp) provided by the International Atomic Energy Agency (IAEA) for different accelerators were used in order to develop a Virtual Source Model (VSM) for clinical photon beams. Spectral energy distributions extracted from supplied phsp files were used to define the radiation pattern of a virtual extended source in a hybrid model which is completed with a virtual diaphragm used to simulate both electron contamination and the shape of the penumbra region. This simple virtual model was used as the radiation source for dosimetry calculations in a water phantom. The proposed model proved easy to build and test, and good agreement with clinical accelerators dosimetry measurements were obtained for different field sizes. Our results suggest this simple method could be useful for treatment planning systems (TPS) verification purposes. (C) 2013 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.