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A method for the reconstruction of 2d - slice images from computer tomographic 3d - projection data, which as a complete and incomplete (english truncated) projections have been registered
A method for the reconstruction of 2d - slice images from computer tomographic 3d - projection data, which as a complete and incomplete (english truncated) projections have been registered
A method for the reconstruction of 2d - slice images from computer tomographic 3d - projection data, which as a complete and incomplete projections have been registered, with the following process steps:1.1 3D - scanning of an object to be examined (1) along a longitudinal axis of a computer tomography - system by means of an x-ray tubes - detector system, wherein the x-ray tubes - detector system a scanning region, so-called scan field of view sfov, which, from the object to be examined (1) is at least partly, and, by rotation of the x-ray tubes - detector system in order to the system axis of a plurality of projection angles the 3d - projection data as a complete and incomplete projections be detected, wherein regions of the object to be examined (1), which are arranged in the sfov, in all projections completely, and regions of the object to be examined (1), which project beyond the sfov and in a region which widens towards the sfov, so-called extended scan field of view esfov, are not in all the projections and thus incomplete can be projected, wherein the esfov the sfov with comprises,1.2 Providing of the recorded 3d - projection data as a 3d - a sinogram,1.3 Supplement the incomplete projections in the 3d - a sinogram with first supplementary items of data, which by means of a first extra polarity - algorithm heavy-duty be determined and the incomplete projections in the esfov complete,1.4 Reconstruct 3d - image data in a the esfov corresponding image region, so-called extended image field of view efov, the first supplementary data from the completed 3d - projection data,1.5 Generating a first 2d - cutting pattern from the 3d - image data,1.6 2D - can be set in a projection of the first 2d - cutting pattern in the sfov for the production of 2d projection data - can be set in the reproduced as a complete and incomplete object ions of the first 2d - cutting pattern to be generated, wherein regions of the first 2d - cutting pattern, which in the sfov, in all object ions can be set in a completely, and areas of the first 2d - cutting pattern, the outside of the sfov in the esfov are not reproduced in all object ions and thus incomplete be reprojected,1.7 Providing the 2d projection data - can be set as a 2d - a sinogram,1.8 Supplement the incomplete repro object ions in the 2d - a sinogram with second supplementary items of data, which by means of a second extra polarity - algorithm heavy-duty be determined, ..
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