Measurement of thermal and ultrasonic properties of some biological tissues

被引：87

作者：

El-Brawany, M.A. ^{[1
]}

Nassiri, D.K. ^{[2
]}

Terhaar, G. ^{[3
]}

Shaw, A. ^{[4
]}

Rivens, I. ^{[3
]}

Lozhken, K. ^{[2
]}

机构：

[1] Department of Industrial Electronics and Control Engineering, Faculty of Electronic Engineering, Menofia University

[2] St George's Healthcare NHS Trust, St George's Hospital, London, SW17 0QT, Blackshaw Road

[3] Joint Department of Physics, Institute of Cancer Research, Royal Marsden NHS Trust, Sutton, Surrey, SM2 5PT, Downs Road

[4] Division of Quality of Life, National Physical Laboratory, Teddington

来源：

Journal of Medical Engineering and Technology | 2009年 / 33卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

Biological tissue; Speed of sound; Thermal conductivity; Thermal diffusivity; Ultrasonic attenuation;

D O I：

10.1080/03091900802451265

中图分类号：

学科分类号：

摘要：

The measurement of thermal and ultrasonic properties of biological tissues is essential for the assessment of the temperature rise induced in vivo by diagnostic ultrasound. In this paper, we present measurements of thermal conductivity, thermal diffusivity, speed of sound and ultrasonic attenuation of fresh ex vivo porcine tissue, namely muscle (from abdomen and leg), skin with subcutaneous fat (from abdomen and leg), abdominal fat and bone. The easurements of the thermal properties of biological tissue samples are based on a transient method. Thermal property measurements show that subcutaneous fat has the lowest thermal conductivity (0.23 Wm71 K71), while muscle gives the highest values (0.46 Wm71 K71). Thermal diffusivity of muscle tissue recorded the highest value among the studied tissues (0.16 mm2 s71) while that of skin with subcutaneous fat gave the lowest value (0.11 mm2 s71). A scanning acoustic macroscope was used to measure attenuation coefficient and speed of sound for the tissue sa ples. The results for the speed of sound are broadly similar to those reported in the literature. The power law dependence of the attenuation coefficient of the form Z-a f b as a function of frequency was found to be more appropriate than the linear fit in this study.

引用

页码：249 / 256

页数：7

共 26 条

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