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Abstract #4055

Proton Resonance Shift based Temperature Mapping with Field Monitoring

David O. Brunner 1 , Simon Gross 1 , Lars Kasper 1 , Bertram J. Wilm 1,2 , Christoph Barmet 1,2 , and Klaas P. Pruessmann 1

1 Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, 2 Skope Magnetic Resonance Technologies LLC, Zurich, Switzerland

Temperature mapping based on the temperature dependence of the chemical shift of water protons offers high sensitivity, however it is also subject to many confounds. Mainly drifts in the magnetic fields have to be corrected for in order to achieve high accuracy. Therefore field monitoring based on an array of 16 temperature stabilized NMR field probes is used to reconstruct phase based temperature maps for field drifts up to 3 rd order in space. Sub-degree accuracy was achieved even in the presence of comparably strong dynamic field perturbation in-vitro in comparison to fluoroptic temperature reference probes.

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