RT Journal Article SR Electronic T1 Scintigraphic Screening Prior to Visceral Arteriography in Acute Lower Gastrointestinal Bleeding JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1081 OP 1083 VO 39 IS 6 A1 Richard Gunderman A1 Jeffrey Leef A1 Kenneth Ong A1 Richard Reba A1 Charles Metz YR 1998 UL http://jnm.snmjournals.org/content/39/6/1081.abstract AB