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Abstract #3209

Highly Accelerated Compressed-Sensing-Based Field-mapping is Possible for Body QSM Applications

Christof Böhm1, Julio Oscanoa1,2, Sophia Kronthaler1, Maximilian N. Diefenbach1,3, Alexandra Gersing1, Jakob Meineke4, and Dimitrios C. Karampinos1
1TUM, Munich, Germany, 2Stanford University, Stanford, CA, United States, 3Division of Infectious Diseases and Tropical Medicine, University Hospital, LMU, Munich, Germany, 4Philips Research, Hamburg, Germany

Body QSM relies on accurate magnetic field-mapping that particularly accounts for the presence of fat. Due to the need to account for T2* effects and perform water–fat separation, water–fat-imaging-based field-mapping typically acquires multiple echoes with appropriate echo time step, increasing the total required scan time especially for high-resolution body QSM. To reduce scan time, several acceleration schemes have been proposed, such as parallel imaging and compressed sensing (CS). This work demonstrates the feasibility of high CS acceleration factors to distinguish strong para- and diamagnetic susceptibility sources in body regions with CS acceleration factors of 10 and higher.

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