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

Yu Chung N. Cheng, Robert W. Brown, Yiu Cho Chung, Jeffrey L. Duerk, Hiroyuki Fujita, Jonathan S. Lewin, Donald E. Schuele, Shmaryu Shvartsman

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Pages (from-to)70-76
Number of pages7
JournalJournal of Magnetic Resonance Imaging
Volume8
Issue number1
DOIs
StatePublished - Jan 1 1998

Keywords

  • Ablation
  • Conductivity
  • Electric field
  • Heat equation
  • Interventional MRI
  • Lesion shape
  • Radiofrequency

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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