Imaging for Physicists

2D-/3D-PET 2D-PET • Geometric collimation with septa

3D-PET • Projections at polar angles θ>0° measured • Increased sensitivity • Higher scatter fraction • Special reconstruction algorithms are necessary

• Data sampling only with θ=0° • Lower overall sensitivity • Lower fraction of scattered photons

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ESTRO Teaching Course Advanced Imaging: PET – Basic Principles