Keywords: Myocardium, Quantitative Imaging, Ultra-high field; Dictionary matching; T1; T2; 5.0T; Cartesian;
Motivation: While 5.0T ultra-high field MRI offers superior resolution and signal-to-noise ratio, it introduces pronounced field inhomogeneity effects, which hinders myocardial quantification approaches.
Goal(s): To validate the feasibility of simultaneous myocardial multi-parametric mapping (MultiMap) on a 5.0T MRI scanner.
Approach: Cardiac MultiMap was implemented at 5.0T using single-shot Cartesian acquisition and dictionary-based quantification with pixel-wise B1+ correction, replacing bSSFP with FLASH readout to improve robustness to B0 field inhomogeneity. Quantification accuracy was evaluated through phantom and in-vivo experiments.
Results: T1 and T2 can be accurately estimated using MultiMap at 5.0T.
Impact: The validation of simultaneous myocardial multi-parametric mapping at 5.0T demonstrated promising performance, with potential for more accurate myocardial assessments in clinical settings.
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