There was a strong association between TTE and MRI-derived parameters : RV end-diastolic area ( by TTE imaging ) and RV end-diastolic volume ( by MRI ) , R ( @ ) = @ ( P < @ ) ; RV fractional area change by TTE imaging and RVEF by MRI , R ( @ ) = @ ( P < @ ) ; and tricuspid annular plane systolic excursion by TTE imaging and RVEF by MRI , R ( @ ) = @ ( P < @ ) .