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resolution modeling
ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring
27
Image space
Projection space
Current
image
estimate
Estimated
Projection
Measured
Projection
Forward
projection
Comparison
Error
Projection
Back-
projection
Update
estimate
Error
Image
+ convolution
of PSF
+ deconvolu-
tion of PSF
• May introduce
Gibbs-artifacts
• Not necessarily
activity conservation