自聚焦多元辐射器超声热场的计算机模拟与实验研究  

Computer Simulation and Experimental Research of Multi-element Ultrasonic Applicator

作　　者：梅媚[1] 张力新[1] 王玮[1] 田锡惠[1] 万柏坤[1] 

机构地区：[1]天津大学精仪学院,天津300072

出　　处：《压电与声光》2004年第4期325-327,330,共4页Piezoelectrics & Acoustooptics

基　　金：天津市自然科学基金资助项目(003609111)

摘　　要：分析了非相干自聚焦多元辐射器的声场结构,对该声场进行了模拟计算,绘制了声强分布图,并利用自行研制的九元阵装置进行了实验研究。结果表明:非相干自聚焦多元辐射器可以产生具有较好聚焦特性的超声热场;焦域吸收率SAR大于80%,焦域温度在2s内达45°C,焦域直径在 5mm以内。上述特性适合于高强度超声聚焦热疗使用。The structure of the self-focused and non-interferential transducer array in their ultrasonic field has been analyzed in detail in this paper.At the same time, with the help of the fast computing ability of the computer, the simulation analysis has been done, and the ultrasonic field distribution is drawn in figures. The results show that: the applicator has a good focus character in the deep tissue region. Specific absorption rate (SAR) >80%, the focus region can reach the temperature of higher than 45°C only used less than 3 seconds, the diameter is within 5mm, which met to the need of high strength ultrasound hyperthermia.

关 键 词：超声热疗 热场分布 自聚焦阵 

分 类 号：R454[医药卫生—治疗学]