Calculated RF electric field and temperature distributions in RF thermal ablation: Comparison with gel experiments and liver imaging
✍ Scribed by Yu-Chung N. Cheng; Robert W. Brown; Yiu-Cho Chung; Jeffrey L. Duerk; Hiroyuki Fujita; Jonathan S. Lewin; Donald E. Schuele; Shmaryu Shvartsman
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 850 KB
- Volume
- 8
- Category
- Article
- ISSN
- 1053-1807
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✦ Synopsis
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.