RT Journal Article SR Electronic T1 Ventilation Perfusion Lung Scanning in the Evaluation of Right-to-Left Shunting JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 2036 OP 2039 VO 33 IS 11 A1 Harold I. Palevsky YR 1992 UL http://jnm.snmjournals.org/content/33/11/2036.abstract AB