發(fā)布時間：2018-01-11 13:29

  本文關(guān)鍵詞：光纖水聽器測量聚焦換能器聲壓和溫度分布　出處：《北京化工大學(xué)學(xué)報(自然科學(xué)版)》2016年05期 　論文類型：期刊論文

  更多相關(guān)文章： 光纖水聽器 高強度聚焦超聲(HIFU) 溫度場 聲場 測量

【摘要】：為了解決人體中高強度聚焦超聲(HIFU)焦點處的溫度場分布檢測的難題,給出了從聲壓分布入手探測溫度場分布問題的新方法。通過搭建光纖水聽器自動掃描系統(tǒng),利用光纖水聽器同時測量仿組織材料(TMM)樣本中焦斑區(qū)域的聲場和溫度的分布,探究聲壓和溫度在人體組織中的分布關(guān)系。通過實驗得出,聲壓最大處和溫度場最高處坐標同為(0 mm,0 mm);-3 d B和-6 d B聲束寬度:聲壓為2.4 mm、3.22 mm,溫度為2.44 mm、2.98 mm。實驗結(jié)果表明,聲壓和溫度的最大值高度重合;仿組織材料樣本中超聲焦點處的橫切面溫度分布要比聲壓分布陡峭,即相比聲壓分布,溫度場的能量分布更加集中,焦點半徑更小。
[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.
【作者單位】： 北京化工大學(xué)信息科學(xué)與技術(shù)學(xué)院;中國計量科學(xué)研究院力學(xué)與聲學(xué)計量科學(xué)研究所;
【分類號】：TH789
【正文快照】： 引言高強度聚焦超聲(HIFU)是近年來迅速發(fā)展起來的腫瘤治療技術(shù),其治療原理是利用超聲的熱效應(yīng),將高溫的超聲聚焦在病灶,瞬間產(chǎn)生高溫,使得靶區(qū)腫瘤發(fā)生不可逆的凝固性壞死,達到治療目的[1]。聚集超聲的點通常稱為焦域,焦域的溫度分布測量和控制是HIFU治療的關(guān)鍵[2-3]。光纖水

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