RT Journal Article SR Electronic T1 Introduction JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1S OP 4S DO 10.2967/jnumed.108.053751 VO 49 IS Suppl 2 A1 Sanjiv Sam Gambhir YR 2008 UL http://jnm.snmjournals.org/content/49/Suppl_2/1S.abstract AB