RT Journal Article SR Electronic T1 Left Ventricular Ejection Fraction and Gated SPECT—Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1121 OP 1122 VO 41 IS 6 A1 Guido Germano A1 Daniel S. Berman YR 2000 UL http://jnm.snmjournals.org/content/41/6/1121.abstract AB