RT Journal Article SR Electronic T1 ECAT: A New Computerized Tomographic Imaging System for Positron-Emitting Radiopharmaceuticals JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 635 OP 647 VO 19 IS 6 A1 Michael E. Phelps A1 Edward J. Hoffman A1 Sung-Cheng Huang A1 David E. Kuhl YR 1978 UL http://jnm.snmjournals.org/content/19/6/635.abstract AB