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 Chen, Chi-Hsien A1 Muzic, Raymond F. A1 Nelson, A. Dennis A1 Adler, Lee P. YR 1999 UL http://jnm.snmjournals.org/content/40/1/118.abstract AB