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Definition of "filtered backprojection" |
an algorithm for image reconstruction from projections. In the filtering part of the algorithm, the projections are measured, their Fourier transforms computed, and the transforms are multiplied (filtered) by a weighting function. In the backprojection part, the inverse Fourier transforms of the weighted projections are computed and summed to yield the reconstructed image. Filtered back projection is the reconstruction algorithm currently used by almost all commercial computed tomography scanners. |
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