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Fig. 7 | Journal of Cardiovascular Magnetic Resonance

Fig. 7

From: Systolic ShMOLLI myocardial T1-mapping for improved robustness to partial-volume effects and applications in tachyarrhythmias

Fig. 7

Example of adjustment of TD to optimise T1 fit and improve T1 estimation. In this patient with atrial fibrillation and slow ventricular response (mean HR 40–50 bpm), TD 0 ms (short readout) was associated with underestimation of T1 values and distinctively darker appearance of myocardial tissue on the R2 map. Examination of cine images led to the recognition that the longer RR interval was associated with delayed peak systolic contraction, and thus TD 0 ms acquired data during the peak of myocardial contraction in mid-systole with associated cardiac motion. Subsequent repeat acquisition with a “tailored” TD of 100 ms (short readout) led to data acquisition at end-systole, avoiding myocardial motion and leading to much improved T1 fit on the R2 map

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