| 基于时频分析的反射超声无损测温新方法 |
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| 引用本文： | 于洪斌,王鸿樟.基于时频分析的反射超声无损测温新方法[J].上海交通大学学报,1999,33(10):1202-1205. |
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| 作者姓名： | 于洪斌 王鸿樟 |
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| 作者单位： | 上海交通大学生物医学工程系，上海 200030 |
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| 摘 要： | 为适应超声加热治癌中控温的需求，提出了一种无损测温法．基于维格纳分布函数（ＷＤＦ）的时频图分析，导出分层介质目标中相邻层上回波脉冲频谱幅度之比与相邻层声速差之间的关系．设以正态函数描述肿瘤升温后的声速分布，解得声聚焦点邻区内沿层面法线方向上的温度分布．计算结果与实测结果吻合良好．
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| 关 键 词： | 超声热疗 无损测温 维格纳分布函数 分层介质 |
| 文章编号： | 1006-2467(1999)10-1202-04 |
| 修稿时间： | 1998年5月21日 |
New Method of Noninvasive Temperature Estimation by Ultrasound Echo Pulses Based on Time-Frequenty Analysis |
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| YU Hong bin,WANG Hong zhang Dept. of BME,Shanghai Jiaotong Univ.,Shanghai ,China.New Method of Noninvasive Temperature Estimation by Ultrasound Echo Pulses Based on Time-Frequenty Analysis[J].Journal of Shanghai Jiaotong University,1999,33(10):1202-1205. |
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| Authors: | YU Hong bin WANG Hong zhang Dept of BME Shanghai Jiaotong Univ Shanghai China |
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| Institution: | YU Hong bin,WANG Hong zhang Dept. of BME,Shanghai Jiaotong Univ.,Shanghai 200030,China |
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| Abstract: | A new method of noninvasive temperature estimation by ultrasound echoes with its experimental verification was presented. It is based on time frequency diagram analysis of Wigner distribution function (WDF). The relation between the ratio of maximum spectra of the echoes from the neighbouring layers and their sound speed difference in the layered target was derived. Supposing the focused sound velocity distribution along the normal of the layers is Gaussian, the temperature distribution around the focus point can be calculatecd. The comparison of the calculated results with the measured values shows well coincidence. |
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| Keywords: | ultrasonic hyperthermia noninvasive temperature estimation Wigner distribution function (WDF) layered media |
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