  Recent developments in artificial intelligence technology have enabled new
developments that can improve attenuation and scatter correction in PET and
SPECT. These technologies will enable the use of accurate and quantitative
imaging without the need to acquire a CT image, greatly expanding the
capability of PET/MRI, PET-only, and SPECT-only scanners. The use of AI to aid
in scatter correction will lead to improvements in image reconstruction speed,
and improve patient throughput. This paper outlines the use of these new tools,
surveys contemporary implementation, and discusses their limitations.
