New realization of the image reconstruction |ω|-type filters using equiripple FIR and IIR structure
Piotr Bogorodzki, A. Piatkowski · Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society · 1992
A cmmon technique for image reconstruction in CT and MR tomography is so called Back Projection (BP) algorithm. The weighting function used in first step of this algorithm can be viewed in space domain as a zerophase FIR (Finite Impulse Response) filter, or as realization an idealized magnitude shape (e.g. |ω|). Another realization of |ω| — filters will be presented, with better approximation near the low frequencies.