@ consecutive patients ( mean age , @ @ years ) with ST-segment elevation AMI underwent two randomized cardiac magnetic resonance studies ( exam intervals between @ and @h ) on a @ T unit during the first week after the event using gadobenate dimeglumine ( Gd-BOPTA ) at the dose of @ mmol/kg BW ( standard dose or SD group ) and @ mmol/kg BW ( half dose or HD group ) .