RT Journal Article SR Electronic T1 Alternative Method for Calculating Right Ventricular Ejection Fraction from First-Pass Time-Activity Curves JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1990 OP 1997 VO 29 IS 12 A1 Kazuro Iwata YR 1988 UL http://jnm.snmjournals.org/content/29/12/1990.abstract AB