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SSFP-based MR thermometry

✍ Scribed by Vaishali Paliwal; AbdEl-Monem El-Sharkawy; Xiangying Du; Xiaoming Yang; Ergin Atalar

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
253 KB
Volume
52
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

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.

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