Cover Imaging for Physicists

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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