Simulation of thermal field induced by concave spherical transducer in multi-layer media

作     者：丁亚军 钱盛友 廖志远 

作者机构：Institute of Image Recognition and Computer VisionHunan Normal University College of Physics and Information ScienceHunan Normal University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2013年第20卷第11期

页      面：3166-3170页

核心收录：

学科分类：1004[医学-公共卫生与预防医学(可授医学、理学学位)] 10[医学] 

基　　金：Project(11174077)supported by the National Natural Science Foundation of China Project(11JJ3079)supported by the Hunan Provincial Natural Science Foundation of China Projects(12C0237,11C0844)supported by the Science Research Program of Education Department of Hunan Province,China 

主　　题：multi-layer media concave spherical transducer high intensity focused ultrasound thermal field 

摘      要：High intensity focused ultrasound(HIFU)therapy is an effective method in clinical treatment of tumors,in order to explore the bio-heat conduction mechanism of in multi-layer media by concave spherical transducer,temperature field induced by this kind of transducer in multi-layer media will be simulated through solving Pennes equation with finite difference method,and the influence of initial sound pressure,absorption coefficient,and thickness of different layers of biological tissue as well as thermal conductivity parameter on sound focus and temperature distribution will be analyzed,*** results show that the temperature in focus area increases faster while the initial sound pressure and thermal conductivity *** absorption coefficient is smaller,the ultrasound intensity in the focus area is bigger,and the size of the focus area is *** the thicknesses of different layers of tissue change,the focus position changes slightly,but the sound intensity of the focus area will change *** temperature in focus area will rise quickly before reaching a threshold,and then the temperature will keep in the threshold range.