RT Journal Article SR Electronic T1 20 Years of PET/CT: A Conversation with David Townsend and Thomas Beyer JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1541 OP 1543 DO 10.2967/jnumed.120.257725 VO 61 IS 11 A1 Townsend, David A1 Beyer, Thomas A1 Czernin, Johannes YR 2020 UL http://jnm.snmjournals.org/content/61/11/1541.abstract AB