Fig. 2

Z-spectrum of (a) scar region and (b) healthy myocardium. By using the 3-pool-model fitting, Z-spectrum (black) was separated into CEST curve (pink), MT curve (blue) and DWS curve (green). The center of DWS curve represents the resonant water frequency (B₀ field). The peak of CEST curve was defined as the CEST signal. It is clear that the healthy myocardium has higher CEST signal than scar, which suggests more Cr distribution in the healthy myocardium