大功率超声功率计的研制及高强度聚焦超声肿瘤治疗头功率检测  

Development of high power ultrasound power meter and the output measurement of high intensity focused ultrasound transducer

作　　者：霍彦明[1] 齐红[1] 宋文章[2] 王智彪[2] 

机构地区：[1]河北科技大学电气信息学院,石家庄050054 [2]重庆医科大学超声医学工程研究所,重庆400041

出　　处：《声学学报》2005年第2期158-162,共5页Acta Acustica

摘　　要：研制一种将机械天平、辐射压力法和智能控制结合在一起的大功率超声功率计,该功率计可以安装不同种类的反射靶面或吸收靶面对多种超声换能器进行功率测量;用砝码对该功率计进行校准和误差分析,结果显示该功率计具有稳定性好、精度高、测量范围大的特点。用锥面反射靶和吸收靶对高强度聚焦超声肿瘤治疗头的输出功率进行测量,实验结果表明:一方面该功率计可以满足大功率、高精度测量要求,另一方面被测量的临床治疗用高强度聚焦超声肿瘤治疗头的驱动电压在600-2200 V之间,其功率输出稳定、可靠,在此范围之外功率输出误差变大,超过5％。A kind of ultrasound power meter to measure high ultrasound power is developed. It is based on the radiation pressure method, mechanical balance and intelligent controlling techniques in the design. With different kinds of targets, include reflector or absorbing target, the output power of many kinds of ultrasound transducer can be measured by it. It is calibrated by weights and the error analysis shows that it has high resolution and high stability. With cone reflector and absorbing target, the power of a high intensity focused ultrasound treatment transducer driven at voltage in clinical application is measured by it. The results show that the ultrasound power meter can be used to measure high ultrasound power and it has high precision. Also the results show that the power output of high intensity focused ultrasound transducer has high stability when the driven voltage is from 600 V to 2200 V, which is usually applied by doctor. When the driven voltage is less than 600 V or higher than 2200 V, the output of the transducer will has error more than 5% .

关 键 词：高强度聚焦超声 超声功率计 治疗头 功率检测 肿瘤 研制 辐射压力法 超声换能器 机械天平 智能控制 功率测量 误差分析 测量范围 输出功率 测量要求 驱动电压 临床治疗 功率输出 输出误差 稳定性 高精度 靶面 吸收 反射 

分 类 号：R730.5[医药卫生—肿瘤]