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SSFP‐based MR thermometry
Author(s) -
Paliwal Vaishali,
ElSharkawy AbdElMonem,
Du Xiangying,
Yang Xiaoming,
Atalar Ergin
Publication year - 2004
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20231
Subject(s) - steady state free precession imaging , nuclear magnetic resonance , medicine , radiology , physics , magnetic resonance imaging
Of the various techniques employed to quantify temperature changes by MR, proton resonance frequency (PRF) shift‐based phase‐difference imaging (PDI) is the most accurate and widely used. However, PDI is associated with various artifacts. Motivated by these limitations, we developed a new method to monitor temperature changes by MRI using the balanced steady‐state free precession (balanced‐SSFP) pulse sequence. Magnitude images obtained with the SSFP pulse sequence were used to find the PRF shift, which is proportional to temperature change. Spatiotemporal temperature maps were successfully reconstructed with this technique in gel phantom experiments and a rabbit model. The results show that the balanced‐SSFP‐based method is a promising new technique for monitoring temperature. Magn Reson Med 52:704–708, 2004. © 2004 Wiley‐Liss, Inc.