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2D-/3D-PET
2D-PET
•Geometric
collimation with
septa
•Data sampling
only with θ=0°
•Lower overall
sensitivity
•Lower fraction
of scattered
photons
3D-PET
•Projections at
polar angles θ>0°
measured
•Increased
sensitivity
•Higher scatter
fraction
•Special
reconstruction
algorithms are
necessary