X-ray diagnostic apparatus with an X-ray converter
AssigneeSiemens Aktiengesellschaft
InventorsHartmut Sklebitz, Martin Hoheisel
Life of this patent
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Abstract
An X-ray diagnostic apparatus has an X-ray source that emits a diverging X-ray beam bundle that strikes a planar X-ray image converter at various angles, the converter having a substrate, image elements on the substrate arranged in a matrix with a semiconductor layer and a layer that absorbs X-ray beams. The X-ray-absorbing layer is fashioned thicker in the region at which a perpendicular ray of the X-ray beam bundle strikes the detector than in the region at which an oblique ray strikes, so that the reduction of the modulation transfer function in the region of an oblique beam incidence remains as small as possible.
Claims14
In an X-ray diagnostic apparatus having an X-ray source which emits a diverging X-ray beam bundle, a planar X-ray image converter disposed in a path of said X-ray beam bundle which is struck by respective X-rays within said X-ray beam bundle at different angles, said converter comprising a substrate with a plurality of imaging elements disposed in a matrix on a semiconductor layer and an X-ray absorbing layer disposed on said substrate, the improvement comprising:
- said X-ray absorbing layer having a thickness in a region of said X-ray absorbing layer struck by a perpendicular X-ray of said X-ray beam bundle greater than in a region struck by an oblique X-ray of said X-ray beam bundle.
Dependencies are inferred from the claim text.