RT Journal Article SR Electronic T1 Comments on Specifying the Performance of a Positron Tomograph JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 82 OP 83 VO 23 IS 1 A1 Hoffman, Edward J. YR 1982 UL http://jnm.snmjournals.org/content/23/1/82.2.abstract AB