RT Journal Article SR Electronic T1 Rotational Variation in Gamma Camera Sensitivity and Uniformity Due to a Defective Collimator JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 98 OP 98 VO 15 IS 2 A1 O’Connor, Michael K. YR 1987 UL http://tech.snmjournals.org/content/15/2/98.abstract AB