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Abstract #1472

Evaluation of RF-related heating of an MR-compatible catheter using MR-Thermometry

Marylène DELCEY1,2,3,4, Pierre BOUR1,2,3,5, Valery OZENNE1,2,3, and Bruno QUESSON1,2,3

1IHU Liryc, Electrophysiology and Heart Modeling Institute, Fondation Bordeaux Université, Bordeaux, France, 2Univ. Bordeaux, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux, France, 3INSERM, Centre de recherche Cardio-Thoracique de Bordeaux, U1045, Bordeaux, France, 4Siemens Healthineers, Saint-Denis, France, 5Image Guided Therapy SA, Bordeaux, France

This study presents a fast MR-thermometry sequence interleaved with a tunable SAR deposition module to simulate energy deposition of any clinically relevant MR-acquisition sequence. Validation of the method was performed on a 1.5T scanner using an MR-compatible catheter inserted into an agar-agar gel. Maximal temperature increase measured during equivalent SAR of a cardiac cine sequence was 41.8°C for a 90° flip angle. This sequence may help quantifying the maximal acceptable SAR for any patient wearing implanted device and/or for volumetric imaging of local heating in multi-transmit technology at high field.

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