Figure 2.

a: Approach to steady‐state for spoiled gradient‐echo (SPGR) sequence with repetition time = 5 ms, $\alpha ={10}^{\circ }$ computed with EPG, EPG‐X(BM), and EPG‐X(MT). Expected steady‐state signals marked with arrows were computed using Equation (A1). After approximately 200 repetition time periods, the different transient simulations each approach the expected steady state. b: Steady‐state signal as a function of RF spoiling phase increment ${\Phi }_0$. The steady‐state signals for the single‐compartment, MT, and BM models are all different. All are variable with ${\Phi }_0$, and as expected, do not always agree with the direct steady‐state calculations, which are computed assuming perfect spoiling.