RT Journal Article SR Electronic T1 Clinical Appraisal of an Experimental Converging Collimator JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 291 OP 293 VO 15 IS 4 A1 Murphy, Paul H. A1 Burdine, John A. A1 Calderon, Marcos YR 1974 UL http://jnm.snmjournals.org/content/15/4/291.abstract AB