<prompt> Answer this question truthfullyHow is cardiac MRI utilized for diagnosing congestive heart failure?  <response>: <reason> Cardiac magnetic resonance CMR imaging with late gadolinium enhancement LGE, T1 mapping, and extracellular volume may diagnosis myocardial fibrosis scar in subendocardial area for patients with ischaemic heart disease IHD and scar in mid-wall area for dilated cardiomyopathy DCM. Moreover, CMR may identify myocardial characterization including myocarditis, amyloidosis, sarcoidosis, Chagas disease, Fabry disease, LV non-compaction cardiomyopathy, haemochromatosis, and arrhythmogenic cardiomyopathy. 