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Abstract #2549

An extended version of the restricted SAR protocol allowing safe in vivo testing of RF coils in an unconditional and flexible way

Natalia Dudysheva1,2, Alexis Amadon1, Alexandre Vignaud1, Redha Abdeddaim3, and Franck Mauconduit1
1CEA, NeuroSpin, Paris-Saclay University, CNRS, Gif-sur-Yvette, France, 2Multiwave Imaging, Marseille, France, 3Fresnel Institute, Aix-Marseille University, CNRS, Marseille, France


This work promotes the RF coil elaboration facilitating its in-vivo testing phase. To exclude patient risk, in-vivo studies with each new coil configuration require prior SAR verifications and commission approval lengthening the design process. The so-called “Restricted SAR” (rS) protocol offers a solution to safely use homemade coils in vivo at any development stage without prior validation. This protocol constrains transmitted RF power and automatically respects the SAR safety limits, whatever the SAR distribution. Here, we propose the extended rS protocol with flexible sequence parametrization. This adjustability offers better B0 mapping coverage, optimal B1+-map estimation, and higher spatial image resolutions.

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