Accuracy of MR temperature measurement based on chemical shift change for radiofrequency ablation using hook-shaped electrodes

Shigeo Okuda; Kagayaki Kuroda; Osamu Kainuma; Koichi Oshio; Hirokazu Fujiwara; Sachio Kuribayashi

doi:10.2463/mrms.3.95

Accuracy of MR temperature measurement based on chemical shift change for radiofrequency ablation using hook-shaped electrodes

Magn Reson Med Sci. 2004 Jul 15;3(2):95-100. doi: 10.2463/mrms.3.95.

Authors

Shigeo Okuda¹, Kagayaki Kuroda, Osamu Kainuma, Koichi Oshio, Hirokazu Fujiwara, Sachio Kuribayashi

Affiliation

¹ Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan. okuda@sc.itc.keio.ac.jp

PMID: 16093625
DOI: 10.2463/mrms.3.95

Abstract

The purpose of the current study is to evaluate the accuracy of MR thermometry for radiofrequency ablation (RFA) with hook-shaped electrodes. The objects were eight extracted bovine livers. The chemical shift change was calculated from MR images acquired with a spoiled gradient echo sequence and compared with the temperature directly measured with a thermocouple. Linear regression was established between them with a coefficient of -0.0110+/-0.0007 ppm/ degrees C and errors were calculated as -0.50+/-7.50 degrees C. MR thermometry is capable of monitoring temperature for RFA.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Catheter Ablation / instrumentation*
Cattle
Electrodes
Equipment Design
Hyperthermia, Induced*
Liver / surgery*
Magnetic Resonance Imaging / methods*
Temperature