Experimental and numerical assessment of MRI-induced temperature change and SAR distributions in phantoms and in vivo

Sukhoon Oh, Andrew G. Webb, Thomas Neuberger, Bu Sik Park, Christopher M. Collins

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

It is important to accurately characterize the heating of tissues due to the radiofrequency energy applied during MRI. This has led to an increase in the use of numerical methods to predict specific energy absorption rate distributions for safety assurance in MRI. To ensure these methods are accurate for actual MRI coils, however, it is necessary to compare to experimental results. Here, we report results of some recent efforts to experimentally map temperature change and specific energy absorption rate in a phantom and in vivo where the only source of heat is the radiofrequency fields produced by the imaging coil. Results in a phantom match numerical simulation well, and preliminary results in vivo show measurable temperature increase. With further development, similar methods may be useful for verifying numerical methods for predicting specific energy absorption rate distributions and in some cases for directly measuring temperature changes and specific energy absorption rate induced by the radiofrequency fields in MRI experiments.

Original languageEnglish (US)
Pages (from-to)218-223
Number of pages6
JournalMagnetic Resonance in Medicine
Volume63
Issue number1
DOIs
StatePublished - Jan 2010

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Experimental and numerical assessment of MRI-induced temperature change and SAR distributions in phantoms and in vivo'. Together they form a unique fingerprint.

  • Cite this