RT Journal Article SR Electronic T1 Increased Specificity in the Diagnosis of Pulmonary Embolism—Reply JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 598 OP 599 VO 21 IS 6 A1 Munir Ahmad YR 1980 UL http://jnm.snmjournals.org/content/21/6/598.2.abstract AB