RT Journal Article SR Electronic T1 Attenuation and Scatter Correction in SPECT for Sources in a Nonhomogeneous Object: A Monte Carlo Study JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1278 OP 1284 VO 32 IS 6 A1 Michael Ljungberg A1 Sven-Erik Strand YR 1991 UL http://jnm.snmjournals.org/content/32/6/1278.abstract AB