Which of the following are true regarding MRI and heart disease?
a) Infarcted myocardium is typically high signal on T2-weighted imaging
b) There is marked enhancement of infarcted myocardium following intravenous gadolinium contrast
c) The cardiac valves are well demonstrated on MRI
d) In acute myocardial Infarction, systolic wall thickening is reduced
e) Viable myocardium may be differentiated from infarcted tissue

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