Verification of Dose Calculations with the Double Gaussianlogistic Model for Carbon-ion Spot Scanning Beam Delivery to Spherical Targets in Water

• 作者: Chen Weiqiang Dai Tianyuan Dai Zhongying He Pengbo Li Qiang Liu Xinguo Ma Yuanyuan Shen Guosheng Yuan Ping Zhang Hui
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报:英文版
• 学科: 物理学
• 关键词: BEAM GAUSSIAN SIZES
• 年，卷（期）: 2018,（1）
• 页码范围: 154-155
• 页数: 2页
• 分类号: O57

摘要

The accuracy of dose calculation is of vital importance in treatment planning system(TPS).Taking the low dose envelope of carbon-ion pencil beam into consideration,a novel model,called as double Gaussian-logistic model,has been proposed to depict the lateral dose distribution of carbon-ion pencil beam in our previous work,where the accuracy of the model was preliminarily verified using both single-spot beam and superposed fields in various cases for carbon-ion pencil beam[1].In this work,virtual spherical target volumes of different sizes in water tank were adopted to testify the superiority of the double Gaussian-logistic modelto the single,double and triple Gaussian models for carbon ion beam further.Based on Monte Carlo(MC)simulation and dose optimization-oriented iterative least square method,comparisons of the dose distributions between the MC simulations and calculations using the single。