RT Journal Article SR Electronic T1 Repeat Perfusion Imaging May Differentiate Airways Obstruction from Pulmonary Embolic Disease: Report of Two Cases JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 57 OP 60 VO 15 IS 2 A1 Greenspon, Lee W. A1 LaManna, Margaret M. A1 Dhand, Sandeep YR 1987 UL http://tech.snmjournals.org/content/15/2/57.abstract AB