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Filtered Backprojection FBP
ESTRO Teaching Course Advanced Imaging: PET – Reconstruction, Contouring
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Backprojection of all projections yields a blurred image.
Unblurring Operation = convolution with an edge
enhancing filter
1D-convolution of the sinogram with a ramp filter that
enhances high frequencies (Linearity of projection
operation allows to convolve projection data with a
filter!)