RT Journal Article SR Electronic T1 Experimental Test-Object Study of Electronically Collimated SPECT JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 178 OP 186 VO 31 IS 2 A1 Manbir Singh A1 R. Ricardo Brechner YR 1990 UL http://jnm.snmjournals.org/content/31/2/178.abstract AB