RT Journal Article SR Electronic T1 Quantitative Bremsstrahlung SPECT Imaging: Attenuation-Corrected Activity Determination JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1213 OP 1216 VO 35 IS 7 A1 Jeffry A. Siegel YR 1994 UL http://jnm.snmjournals.org/content/35/7/1213.abstract AB