In-vitro study of the temperature dependence of the optoacoustic conversion efficiency in biological tissues

被引：3

作者：

Nikitin, S. M. ^{[1
]}

Khokhlova, T. D. ^{[1
]}

Pelivanov, I. M. ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Ctr Int Laser, Moscow 119991, Russia

来源：

QUANTUM ELECTRONICS | 2012年 / 42卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

optoacoustic method; high intensity focused ultrasound; optical properties of biological tissues; temperature monitoring; optoacoustic conversion efficiency; INTENSITY FOCUSED ULTRASOUND; OPTICAL-PROPERTIES; TURBID MEDIA; LIVER-TISSUE; SPEED;

D O I：

10.1070/QE2012v042n03ABEH014674

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The applicability of the optoacoustic (OA) method for monitoring temperature during thermal impact on biological tissues is studied experimentally. Tissues under study were chicken breast (as a model of muscle), porcine lard (as a model of fatty tissue) and porcine liver (as a model of richly perfused tissue). The temperature dependences of the amplitude of the OA signals excited in biological tissues were measured in-vitro in the temperature range of 20-80 degrees C under the narrow laser beam conditions. Measurements were performed in two regimes: during heating and cooling. Similarities and differences in the behaviour of the dependences in different temperature ranges associated with different structural composition of the samples were obtained. The accuracy of temperature reconstruction from experimental data for the investigated tissue types was evaluated. It is shown that during tissue coagulation its temperature can be determined with an accuracy of about 1 degrees C.

引用

页码：269 / 276

页数：8

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