Abstract #3156

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

Marco Fiorito¹, Maksym Yushchenko¹, Mathieu Sarracanie^1,2, 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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