RT Journal Article SR Electronic T1 Reply JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 142 OP 142 VO 24 IS 2 A1 Porter, William C. A1 Karvelis, Kastytis C. YR 1996 UL http://tech.snmjournals.org/content/24/2/142.abstract AB