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Abstract #5216

Pseudo-SSFP magnetic resonance fingerprinting (MRF) at 9.4T

Jinhyeok Choi1 and Hyeonjin Kim1,2

1Department of Biomedical Sciences, Seoul National University, Seoul, Korea, Republic of, 2Department of Radiology, Seoul National University Hospital, Seoul, Korea, Republic of

A balanced steady-state-free-precession (bSSFP) sequence may be preferred in magnetic resonance fingerprinting (MRF) for its high SNR. However, as demonstrated recently at 3.0T, the echo formation in bSSFP is hindered by randomly varying flip-angles in a B0-dependent manner, and yet, the destroyed spin-echo-like signal behavior can be restored by tailoring sequence timings according to varying flip-angles such that the spin ensemble is driven into a pseudo-steady-state. Given more severe B0-inhomogeneity at high-field, we explored the efficacy of the pseudo-steady-state-free-precession (pSSFP) sequence in MRF (pSSFP-MRF) at 9.4T. Our results suggest that pSSFP-MRF has great potential for single-scan multiparameter mapping at high-field.

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