|Table of Contents|

Temperature Dependent Electrical Impedance Characteristics for Porcine Liver in Vitro(PDF)

《南京师大学报(自然科学版)》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2012年02期
Page:
32-38
Research Field:
物理学
Publishing date:

Info

Title:
Temperature Dependent Electrical Impedance Characteristics for Porcine Liver in Vitro
Author(s):
Chen Xuanze12Ma Qingyu1Yang Ling1Zhang Feng1
1.School of Physics and Technology,Nanjing Normal University,Nanjing 210046,China
Keywords:
porcine liver tissueelectrical impedancetemperaturehigh intensity focused ultrasound
PACS:
R312;R730.5
DOI:
-
Abstract:
In order to achieve inhibiting or killing cancer cells without the damage to the normal tissue in high intensity focused ultrasound ( HIFU) treatment,an precise real-time temperature monitoring system should be set up. The purpose of this study is to obtain the temperature dependent electrical impedance characteristics for accurate power control for HIFU application. Combined with the micrographs of porcine liver tissues,it is proved that there is an obvious temperature and heating duration time dependent relation of the electrical impedance characteristics and the electrical impedance decreases with the increasing of temperature. When porcine liver tissue is heated to cell inactivation and tissue coagulation for long time slow heating at 56℃ or short time fast heating at 73℃,significant electrical impedance change occurs with the critical properties. The favorable results provide the basis for further temperature monitoring in HIFU treatment process using the proposed electrical impedance measurement approach.

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Last Update: 2013-03-11