Dynamics of thermoelastic expansion for native and coagulated ex-vivo bovine liver tissues

被引：0

作者：

Soroushian, Behrouz ^{[1
]}

Whelan, William M. ^{[2
]}

Kolios, Michael C. ^{[1
]}

机构：

[1] Ryerson Univ, Dept Phys, Toronto, ON, Canada

[2] Univ PEI, Dept Phys, Charlottetown, PE, Canada

来源：

PHOTONS PLUS ULTRASOUND: IMAGING AND SENSING 2010 | 2010年 / 7564卷

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会; 加拿大健康研究院;

关键词：

optoacoustic imaging; monitoring thermal therapy; laser interferometry; surface displacement measurement; thermoelastic expansion; Gruneisen parameter;

D O I：

10.1117/12.843042

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Dynamics of the thermoelastic expansion of native and coagulated ex-vivo bovine liver tissues after their irradiation by short laser pulses were studied. The differences in optical and thermo-mechanical properties of the native and coagulated samples such as their Gruneisen coefficient and optical attenuation depth were quantitatively determined. It was found that for coagulated ex-vivo bovine liver samples, the optical attenuation depth decrease by an average of 47%. Also significant differences were observed in the dynamics of thermoelastic expansion of the tissue surface. These differences can be potentially linked to differences in thermo-mechanical properties between native and coagulated samples. The changes in these properties may be used to understand the mechanisms of contrast between coagulated and non-coagulated tissues in optoacoustic imaging.

引用

页数：4

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