155 / 1116
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
ESTRO Teaching Course Advanced Imaging: PET – Basic Principles
9