title: Accuracy of MR temperature measurement based on chemical shift change for radiofrequency ablation using hook-shaped electrodes.
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.
authors.affiliation: Department of Diagnostic Radiology, Keio University School of Medicine, Tokyo, Japan. okuda@sc.itc.keio.ac.jp
authors.forename: Shigeo
authors.initials: S
authors.lastname: Okuda
authors.forename: Kagayaki
authors.initials: K
authors.lastname: Kuroda
authors.forename: Osamu
authors.initials: O
authors.lastname: Kainuma
authors.forename: Koichi
authors.initials: K
authors.lastname: Oshio
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Fujiwara
authors.forename: Sachio
authors.initials: S
authors.lastname: Kuribayashi
mesh_terms: D000818:Animals; D017115:Catheter Ablation / Q000295:instrumentation*; D002417:Cattle; D004566:Electrodes; D004867:Equipment Design; D006979:Hyperthermia, Induced; D008099:Liver / Q000601:surgery*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D013696:Temperature