光纤水听器测量聚焦换能器声压和温度分布

发布时间：2018-01-11 13:29

本文关键词：光纤水听器测量聚焦换能器声压和温度分布　出处：《北京化工大学学报(自然科学版)》2016年05期 　论文类型：期刊论文

【摘要】：为了解决人体中高强度聚焦超声(HIFU)焦点处的温度场分布检测的难题,给出了从声压分布入手探测温度场分布问题的新方法。通过搭建光纤水听器自动扫描系统,利用光纤水听器同时测量仿组织材料(TMM)样本中焦斑区域的声场和温度的分布,探究声压和温度在人体组织中的分布关系。通过实验得出,声压最大处和温度场最高处坐标同为(0 mm,0 mm);-3 d B和-6 d B声束宽度:声压为2.4 mm、3.22 mm,温度为2.44 mm、2.98 mm。实验结果表明,声压和温度的最大值高度重合;仿组织材料样本中超声焦点处的横切面温度分布要比声压分布陡峭,即相比声压分布,温度场的能量分布更加集中,焦点半径更小。
[Abstract]:In order to solve the problem of detecting the temperature field distribution at the focal point of HIFU (High intensity focused Ultrasound) in human body. A new method for detecting temperature field distribution from sound pressure distribution is presented, and an automatic scanning system for fiber optic hydrophone is built. The distribution of sound field and temperature in the focal spot area of tissue imitating material TMMs was measured by fiber optic hydrophone at the same time, and the distribution of sound pressure and temperature in human tissue was investigated. The coordinates of the maximum sound pressure and the highest temperature field are 0 mm ~ 0 mm ~ (-1); The width of 3 dB and 6 dB sound beam: the sound pressure is 2.4 mm ~ 3.22 mm, the temperature is 2.44 mm ~ 2.98 mm. The experimental results show that the sound pressure is 2.44 mm ~ 2.98 mm. The maximum value of sound pressure and temperature coincides with each other. The temperature distribution in the ultrasonic focus is steeper than that in the sound pressure, that is, compared with the sound pressure distribution, the energy distribution of the temperature field is more concentrated and the focus radius is smaller than that of the sound pressure distribution.
【作者单位】：北京化工大学信息科学与技术学院;中国计量科学研究院力学与声学计量科学研究所;
【分类号】：TH789
【正文快照】： 引言高强度聚焦超声(HIFU)是近年来迅速发展起来的肿瘤治疗技术,其治疗原理是利用超声的热效应,将高温的超声聚焦在病灶,瞬间产生高温,使得靶区肿瘤发生不可逆的凝固性坏死,达到治疗目的[1]。聚集超声的点通常称为焦域,焦域的温度分布测量和控制是HIFU治疗的关键[2-3]。光纤水

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