基于质子诱导声学波定位布拉格峰  

Positioning Bragg peak based on proton induced acoustic wave

作　　者：杜鑫鹏 杨艳[1] DU Xin-peng;YANG Yan(School of Physics and Technology,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学物理科学与技术学院,武汉430072

出　　处：《信息技术》2020年第9期121-123,128,共4页Information Technology

摘　　要：针对质子治疗中对布拉格峰越来越高的定位要求,文中基于质子诱导热声学波提出了一种将布拉格峰和声波速度联合反演的三维布拉格峰算法。文中算法的定位误差稳定在1mm以下。添加不同方差的高斯白噪声后,定位误差也没有超过1.8mm,迭代次数增加到10次后,定位误差由0.69mm下降到0.2522mm。文中算法具有良好的稳定性、抗噪性和鲁棒性。Aiming at the higher positioning accuracy of Bragg peaks in proton therapy,an algorithm for joint inversion of 3 D Bragg peak and acoustic wave velocity based on proton induced thermoacoustic wave is proposed in this paper.The positioning error of the algorithm in this paper is stable below 1 mm.After adding Gaussian white noise with different variances,the positioning error did not exceed 1.8 mm.The distance error decreased from 0.69 mm to 0.2522 mm after the number of iterations is increased to 10 times.The algorithm in this paper has good stability,noise resistance and robustness.

关 键 词：热声学波 质子治疗 联合反演 布拉格峰 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]