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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 Robinson1,2, Barbara Dymerska1,2, Wolfgang Bogner1,2, Markus Barth3, Zaric Olgica1,2, Sigrun Goluch1,4,5, G√ľnther Grabner1,2, Xeni Deligianni6,7, Oliver Bieri6,7, and Siegfried Trattnig1,2

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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