RT Journal Article SR Electronic T1 A Low-Energy Multihole Converging Collimator Compared with a Pinhole Collimator JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 59 OP 64 VO 15 IS 2 A1 R. A. Moyer YR 1974 UL http://jnm.snmjournals.org/content/15/2/59.abstract AB