Abstract #2862

Combining phase information from multi-channel coils using a short TE reference scan (COMPOSER): evaluation with a range of coils and comparison with other approaches at 7T

Simon Daniel Robinson^1,2, Barbara Dymerska^1,2, Wolfgang Bogner^1,2, Markus Barth³, Zaric Olgica^1,2, Sigrun Goluch^1,4,5, Günther Grabner^1,2, Xeni Deligianni^6,7, Oliver Bieri^6,7, and Siegfried Trattnig^1,2

¹High Field Magnetic Resonance Centre, Medical University of Vienna, Vienna, Austria, ²Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, ³Centre for Advanced Imaging, The University of Queensland, Brisbane, Australia, ⁴Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, ⁵Division of Endocrinology and Metabolism, Department of Internal Medicine III, Medical University of Vienna, Vienna, Austria, ⁶Department of Radiology, Division of Radiological Physics, University of Basel Hospital, Basel, Switzerland, ⁷Department of Biomedical Engineering, University of Basel, Basel, Switzerland

A new method for combining phase images from multi-channel radio-frequency coils in the absence of a volume reference coil is presented and tested with calf, breast and head coils at 7 Tesla. This approach, called COMbining Phased array data using Offsets from a Short Echo-time Reference, or COMPOSER, is shown to yield phase matching between channels which is better than a rival, widely adopted reference-free method (MCPC-3D) and comparable with the reference-based Roemer method. COMPOSER can be used with all coil arrays, including the next generation of PTx coils where the transmit array may not be engineered to receive signal.

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