Calculated RF electric field and temperature distributions in RF thermal ablation: comparison with gel experiments and liver imaging.
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.
Cheng
Y C
YC
Department of Physics, Case Western Reserve University and University Hospitals of Cleveland, OH 44106, USA.
Brown
R W
RW
Chung
Y C
YC
Duerk
J L
JL
Fujita
H
H
Lewin
J S
JS
Schuele
D E
DE
Shvartsman
S
S
D000008:Abdominal Neoplasms / Q000473:pathology / Q000601:surgery*; D017115:Catheter Ablation; D004564:Electrocoagulation / Q000379:methods; D006801:Humans; D008099:Liver / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D015642:Radiology, Interventional; D013696:Temperature