T1 mapping has started to be used for both diffuse and focal diseases of the heart and recently in multi-slice mode to investigate the regional (segmental) variations in T1 and ECV. The processing usually involves contouring the endo and epicardial boundaries manually, which could be cumbersome especially for high-volume studies. Recently, we presented a fully automatic approach (FASTR), to calculate T1 and ECV values segment-wise. Here we present the initial validation of our technique in patients post myocardial infarction. FASTR is comparable to an expert-driven contour and has low bias and similar variability in comparison to inter-observer analysis.