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Abstract #1770

Simultaneous Multi-slice MRF with Controlled Aliasing Enabled by Temporal Data Sharing

Di Cui1, Hing-Chiu Chang1, Hua Guo2, Queenie Chan3, and Edward S Hui1

1Diagnostic Radiology, The University of Hong Kong, Hong Kong, Hong Kong, 2Department of Biomedical Engineering, Tsinghua University, Beijing, China, People's Republic of, 3Philips Healthcare, Hong Kong, Hong Kong

Magnetic Resonance Fingerprinting (MRF) enables simultaneous quantification of multiple relaxation parameters, which is further accelerated by usage of simultaneous multi-slice (SMS) technique. SENSE based SMS-MRF reconstruction suffers high g-factor penalty due to similar coil sensitivity profiles of collapsed slices. Here we proposed a new method to solve this problem, by data re-grouping from adjacent time points, spatial controlled aliasing is enabled, after dictionary matching, good parameter mapping of 2 slices with nearly the same sensitivity is acquired at half the acquisition time of single-excitation MRF.

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