Spin-lock dispersion is a promising biomarker for the assessment of myocardial infarction. However, at 3T, the required range of T1⍴ maps acquired at different amplitudes suffers from specific absorption rate (SAR) limitations and off-resonance artifacts. Relaxation Along a Fictitious Field (RAFF) is an alternative to SL preparations with lower SAR requirements while still sampling relaxation in the rotating frame. Thus, a single breath-hold simultaneous TRAFF2 and T2 mapping sequence is proposed for sl dispersion mapping at 3T. High visual quality maps and accurate T2, TRAFF2, and SL dispersion values are achieved with the proposed sequence in phantoms and in vivo.
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