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Abstract #0371

Targeted B1+ Mapping Using 3D Reduced Field-Of-View Catalyzed Double-Angle Method

Dingxin Wang1, Sven Zuehlsdorff2, Reed Omary1, Andrew Larson1

1Departments of Radiology and Biomedical Engineering, Northwestern University, Chicago, IL, USA; 2Siemens Medical Solutions USA, Inc., Chicago, IL, USA

This study proposes a targeted B1+ mapping technique using 3D reduced FOV catalyzed double angle method (DAM). This method is based on 3D catalyzed DAM which allows a short TR for fast B1+ mapping by introducing catalyzation pulses at the end of each repetition cycle of DAM to drive the ratio of the ending longitudinal magnetizations (for the two different flip angle excitations) to unity. This method employs an inner volume 3D turbo spin echo (TSE) sequence to limit the FOV and thereby to shorten imaging time.