RT Journal Article SR Electronic T1 Simultaneous Recovery of Size and Radioactivity Concentration of Small Spheroids with PET Data JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 118 OP 130 VO 40 IS 1 A1 Chi-Hsien Chen A1 Raymond F. Muzic, Jr. A1 A. Dennis Nelson A1 Lee P. Adler YR 1999 UL http://jnm.snmjournals.org/content/40/1/118.abstract AB