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Physics, Techniques and Procedures

Projection reconstruction

the process of generating images from a set of projection measurements. In computed tomography CT , the projections refer to the set of line integrals or raysums through the object. There are a variety of mathematical expressions that can be used to accomplish image reconstruction from a set of projections. These include iterative reconstruction techniques and filtered backprojection. Most reconstruction algorithms are based on the assumption that a large number of projection measurements are made such that every point in the object is included in X-ray paths from all angles. Backprojection of all of these measurements would then result in a blurred image. The blurring can be removed by a filtering of the reconstructed image or a prefiltering of the sets of projection measurements. See image reconstruction.

DLP