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首页> 外文期刊>Journal of Biomechanics >Investigation of temperature-dependent viscoelastic properties of thermal lesions in ex vivo animal liver tissue.
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Investigation of temperature-dependent viscoelastic properties of thermal lesions in ex vivo animal liver tissue.

机译:研究离体动物肝脏组织中热损伤的温度依赖性粘弹性。

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摘要

The viscoelastic characteristics of thermal lesions in ex vivo animal liver are investigated in this paper. Characterization of the moduli of thermal lesions prepared at several temperatures will provide additional information for the elastographic monitoring of radio frequency ablation of hepatic tumors. In this study, the frequency-dependent complex modulus of thermal lesions prepared at temperatures ranging from 60 to 90 degrees C over a frequency range from 0.1 to 50Hz are presented. Lesions were prepared using either radio frequency ablation or double immersion boiling. It was found that both the magnitude and phase of the modulus increase with frequency, a behavior that has been noted in the literature. A new result reported shows that the modulus dependence on temperature reveals a local maximum around 70-75 degrees C corresponding to the temperature at which tissue has released most of its water content. The modulus values at temperatures higher than 70 degrees C continued to increase, but the extent of increase depend on animal species and other factors.
机译:本文研究了离体动物肝脏热损伤的粘弹性特征。在几个温度下制备的热损伤模量的特征将为弹性成像监测肝肿瘤的射频消融提供额外的信息。在这项研究中,提出了在温度范围为60至90摄氏度,频率范围为0.1至50Hz时热损伤的频率相关复数模量。使用射频消融或双浸煮制备病变。已经发现,模量的大小和相位都随频率增加,这在文献中已经指出。报道的新结果表明,模量对温度的依赖性揭示了大约70-75摄氏度的局部最大值,这对应于组织释放大部分水分的温度。在高于70摄氏度的温度下,模量值继续增加,但是增加的程度取决于动物种类和其他因素。

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