A) Regression analysis of the MOLLI for heart rate of 300bpm and flip angle 20°. B) T1 time of 3 vials of the phantom calculated with SE and MOLLI at various heart rates. The measured T1 shows an underestimation, which is less pronounced at high rates (R2 > 0.8). C) T1 map. The measured T1 of the myocardium is 792.9 ± 95.1.