In PET reconstruction, filtered back-projection

Question

Quizplus · Accepted Answer

Filtered back-projection (FBP) techniques are the simplest and quickest way to create the image slice from the projection information stored in a sinogram.However, FBP creates severe streak or star artifacts, increasing image noise and thus reducing contrast, which may mask lesions.Iterative reconstruction algorithms are techniques that sequentially refine estimated pixel values and provide a more accurate reconstruction of the radiotracer distribution in the body.Iterative algorithms significantly reduce streak artifacts compared with FBP reconstruction techniques but provide images with a lower signal-to-noise ratio.

In PET Reconstruction, Filtered Back-Projection