RT Journal Article SR Electronic T1 Positron Camera with Extended Counting Rate Capability JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 653 OP 657 VO 16 IS 7 A1 Gerd Muehllehner YR 1975 UL http://jnm.snmjournals.org/content/16/7/653.abstract AB