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Abstract #3156

Low Field MR Thermometry with a Fast, Interleaved Look-Locker based T1 Mapping Approach.

Marco Fiorito1, Maksym Yushchenko1, Mathieu Sarracanie1,2, and Najat Salameh1
1Laboratory for Adapatable MRI Technology (AMT lab), Dpt of Biomedical Engineering, University of Basel, Basel, Switzerland, 2Medical Image Analysis Centre (Miac AG), Basel, Switzerland

Low field scanners present several advantages for interventional applications, however no standard method has yet arisen from temperature mapping. In this study we investigated the relationship between T1 and temperature at 0.1 T. MR images of four water phantoms, characterised by different T1, were acquired at different temperatures using a multi-slice FLASH sequence based on Look-Locker. Pixel-wise estimation of T1 relaxation through data fitting showed a growing trend with temperature. In light of the large number of time points, compromising SNR by a factor of 2 produced similar results for an almost 4 times faster acquisition.

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