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Method and device for the separate three-dimensional representation of arteries and veins in an examination object and device

There is described a method for a separate three-dimensional representation of arteries and / or veins of a vascular system in an examination object by means of a tomography x-ray device with the following steps: Implementation of a mask pass of the x-ray device with N projections at N angular positions about the examination object without contrast agent; Implementation of a first filler pass of the x-ray device about the examination object with M projections at M of the N angular positions after injection of a contrast agent, where M<N; Implementation of a second filler pass of the x-ray device about the examination object with N-M projections at N-M of the N angular positions directly following the first filler pass; reconstruction of a composite three-dimensional volume data record from an intermediate data record, said intermediate data record being determined from the data records resulting from the mask pass, the first filler pass and the second filler pass by subtraction and combination; Calculation of a reprojection data record for arteries by reprojection of the angular positions of the first filler pass from the composite three-dimensional volume data record and / or calculation of a reprojection data record for veins by reprojection of the angular positions of the second filler pass from the composite three-dimensional volume data record; calculation of a three-dimensional volume data record for arteries and / or a three-dimensional volume data record for veins by weighting the composite three-dimensional volume data record taking into account the respective measured and the respective calculated projection images.
Owner:SIEMENS HEALTHCARE GMBH
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