Fig. 2
From: Three-dimensional free breathing whole heart cardiovascular magnetic resonance T1 mapping at 3 T
Simulation results of the signal intensity and the accuracy of T1 measurement of the proposed sequence. a and b: the available magnetization for IMG1 (a) and IMG2 (b) under different heart rates. The delay time (TSAT) of IMG1 and IMG2 were set to TMAX/2 and TMAX respectively, where TMAX was defined as 80% of R-R interval. c: the available magnetization for IMG3. In this simulation, the initial magnetization was assumed to be 0. d: The relative error of T1 estimation under the different recovery time of IMG3. e and f: Monte Carlo simulation results of the available magnetization for IMG3 (e) and the T1 relative error (f) under different mean heart rates. The targeted minimum recovery time of IMG3 was set to 6 s, and the number of idle heartbeats was calculated by Eq. [A1] according to the mean heart rate. The true heart rate during the simulation fluctuated with a standard deviation of 5 bpm during the recovery period