Fast cardiac T1 mapping including MOLLI with ECG-gating leads to poorer T1 measurement accuracy, since the recovery time of the longitudinal magnetization changes with heart rate variation. Ikekawa et al. proposed correction methods for the changes in the inversion recovery time at each sampling point and in that of longitudinal magnetization on the heartrate variation; however, the specific factor that predominantly improves T1 measurement remains unclear. Here, we investigated the dominant effect of the proposed correction method in the effect of heartrate variation on T1 measurement using BlochSolver.
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