RT Journal Article SR Electronic T1 Collimator Evaluation for Tl-201 Myocardial Imaging JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1282 OP 1282 VO 19 IS 11 YR 1978 UL http://jnm.snmjournals.org/content/19/11/1282.abstract AB