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Abstract #5582

Interventional MR Elastography and thermometry using simultaneous image refocusing (SIR) for multislice monitoring of thermal therapies

Kisoo Kim1, Elodie Breton1, Afshin Gangi1,2, and Jonathan Vappou1

1ICube CNRS / University of Strasbourg, Strasbourg, France, 2Department of Interventional Imaging, Strasbourg university hospital, Strasbourg, France

Interventional MR Elastography (MRE) and thermometry (PRF) using the Simultaneous Image Refocusing (SIR) technique is proposed in order to monitor changes in temperature and biomechanical properties during thermal ablations, in multiple contiguous slices. Compared to the conventional GRE-MRE sequence, two slices are acquired in each TR, with a single motion sensitizing gradient and similar fractional motion encoding. Elasticity maps obtained with SIR-GRE MRE are validated against reference single slice GRE-MRE. Preliminary experiments show the potential of contiguous multislice acquisition to monitor the volumetric extent of the heated area obtained with High Intensity Focused Ultrasound (HIFU) in a phantom.

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