RT Journal Article SR Electronic T1 Re-Evaluation of Absorbed Fractions for Photons and Electrons in Spheres of Various Sizes JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 149 OP 160 VO 41 IS 1 A1 Michael G. Stabin A1 Mark W. Konijnenberg YR 2000 UL http://jnm.snmjournals.org/content/41/1/149.abstract AB