Table I.

Description of the methods studied which use only data in a 20% wide energy window centered on the 140 keV photopeak.

Name	Description
Ideal Scatter Subtraction	The true mean (noise-free) scatter component is subtracted prior to reconstruction
20% Window RBSC	The SRF is modeled during the reconstruction
Perfect Scatter Rejection	Only primary photons are acquired and reconstructed
Perfect Scatter Discrimination	Two data sets are acquired—one containing only primary photons, the other only scattered photons—and both data sets are reconstructed simulataneously