RT Journal Article SR Electronic T1 A Double-Isotope Approach to the Estimation of Depth of Source in Scintigraphic Matrices JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 188 OP 191 VO 10 IS 4 A1 W. Newlon Tauxe A1 Charles T. Dolan YR 1969 UL http://jnm.snmjournals.org/content/10/4/188.abstract AB