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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