Quantitative analysis of LGE were performed by measuring signal intensity ( SI ) , signal-to-noise ratio ( SNR ) in the infarcted myocardium ( IM ) , non-infarcted myocardium ( N-IM ) and left ventricular cavity ( LVC ) in images acquired at @ , @ , @ , @ , @ and @ min after administration of Gd-BOPTA using both contrast media protocol .