RT Journal Article SR Electronic T1 Brain Perfusion SPECT Using an Annular Single Crystal Camera: Initial Clinical Experience JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1456 OP 1461 VO 31 IS 9 A1 B. Leonard Holman A1 Paulo A. Carvalho A1 Robert E. Zimmerman A1 Keith A. Johnson A1 Sabah S. Tumeh A1 Andrew P. Smith A1 Sabastian Genna YR 1990 UL http://jnm.snmjournals.org/content/31/9/1456.abstract AB