RT Journal Article SR Electronic T1 Uniformity Correction for SPECT Using a Mapped Cobalt-57 Sheet Source JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 409 OP 415 VO 26 IS 4 A1 Bernard E. Oppenheim A1 C. Robert Appledorn YR 1985 UL http://jnm.snmjournals.org/content/26/4/409.abstract AB