A dictionary-based reconstruction method was applied to estimate T1 mapping from a series of highly undersampled images acquired with an inversion recovery–prepared FISP sequence and a radial readout. Motion robustness improved using interleaved slice acquisition and data rejection in T1 estimation. The measurement time was 4 s/slice. Phantom and in vivo knee results show an up to 50% data rejection results in less than 10% of quantification accuracy loss, compared to the T1 map reconstructed with the full dataset.
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