[1]陈轩泽,马青玉,杨玲,等.离体猪肝组织电阻抗的温度特性研究[J].南京师大学报(自然科学版),2012,35(02):32-38.
 Chen Xuanze,Ma Qingyu,Yang Ling,et al.Temperature Dependent Electrical Impedance Characteristics for Porcine Liver in Vitro[J].Journal of Nanjing Normal University(Natural Science Edition),2012,35(02):32-38.
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离体猪肝组织电阻抗的温度特性研究()
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《南京师大学报(自然科学版)》[ISSN:1001-4616/CN:32-1239/N]

卷:
第35卷
期数:
2012年02期
页码:
32-38
栏目:
物理学
出版日期:
2012-06-20

文章信息/Info

Title:
Temperature Dependent Electrical Impedance Characteristics for Porcine Liver in Vitro
作者:
陈轩泽12马青玉1杨玲1张凤1
( 1. 南京师范大学物理科学与技术学院,江苏南京210046) ( 2. 南京师范大学强化培养学院,江苏南京210046)
Author(s):
Chen Xuanze12Ma Qingyu1Yang Ling1Zhang Feng1
1.School of Physics and Technology,Nanjing Normal University,Nanjing 210046,China
关键词:
离体猪肝组织电阻抗特性温度高强度聚焦超声
Keywords:
porcine liver tissueelectrical impedancetemperaturehigh intensity focused ultrasound
分类号:
R312;R730.5
摘要:
在高强度聚焦超声治疗技术中为了达到抑制或杀死肿瘤细胞且不损伤正常组织的目的,必须建立准确可靠的温度实时监控系统.本研究旨在获得生物组织电阻抗特性与温度的关系,为超声治疗中的精确温度控制提供依据.结合猪肝组织显微结构的细胞形态研究,证明猪肝组织的电阻抗特性和热作用温度以及时间具有明显依赖性关系,随着温度的升高总体呈现电阻抗下降的趋势,细胞受热失去活性甚至出现组织凝固时,其电阻抗特性发生显著变化,猪肝组织在73℃的快速短时间加热和56℃的慢速长时间加热过程中出现细胞坏死和组织变性的现象,表现出电阻抗特性变化的临界特性,这为进一步进行高强度聚焦超声治疗的电阻抗温度监控新方法提供了理论和实验依据.
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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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金( 10974098) 、江苏省科技厅自然科学基金( BK2009407) 和教育部高等学校博士学科点专项科研基金 ( 20093207120003) .
通讯联系人: 马青玉,博士,教授,研究方向: 声学、电子技术和生物医学物理. E-mail: maqingyu@ njnu. edu. cn
更新日期/Last Update: 2013-03-11