RT Journal Article SR Electronic T1 A Count-Based Radionuclide Method for Volume Quantitation Using Conjugate Imaging and an External Reference Source: Theoretical Consideration and Phantom Study JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 644 OP 651 VO 35 IS 4 A1 Chi-Kwan Yen A1 Aileen D. Lim A1 Robert J. Lull YR 1994 UL http://jnm.snmjournals.org/content/35/4/644.abstract AB