RT Journal Article SR Electronic T1 Theoretical Prediction of the Geometric Transfer Function for Focused Collimators JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1078 OP 1083 VO 15 IS 12 A1 Charles E. Metz A1 Ming W. Tsui A1 Robert N. Beck YR 1974 UL http://jnm.snmjournals.org/content/15/12/1078.abstract AB