Calculated RF electric field and temperature distributions in RF thermal ablation: Comparison with gel experiments and liver imaging

被引：26

作者：

Cheng, YCN ^{[1
]}

Brown, RW ^{[1
]}

Chung, YC ^{[1
]}

Duerk, JL ^{[1
]}

Fujita, H ^{[1
]}

Lewin, JS ^{[1
]}

Schuele, DE ^{[1
]}

Shvartsman, S ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1998年 / 8卷 / 01期

关键词：

radiofrequency; electric field; conductivity; heat equation; ablation; lesion shape; interventional MRI;

D O I：

10.1002/jmri.1880080116

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

The present paper is a study of theoretic modeling and experimental tests of that modeling for the local heating due to radiofrequency thermal ablation. A model is developed for the current and the associated electric field produced by a radiofrequency ablation probe. The temperature distributions resulting from the induced ohmic currents in the surrounding material are considered. A comparison is made between the theoretic temperature profiles and the shapes of thermal ablation 'lesions' produced in a controlled gelatin sample experiment. Comparison with the contours of human thermally induced Liver lesions found in MRI studies also provides a validation of the success of the modeling. Successful modeling should lead to methods for optimization of the ablation procedure, especially as it is used in interventional MRI.

引用

页码：70 / 76

页数：7

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