Radiation screen for an x-ray device
AssigneeSiemens Aktiengesellschaft
InventorRobert Petrik
Life of this patent
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Abstract
The invention relates to a radiation screen for an X-ray device, comprising at least one radiation limiting means which is displaceably mounted and is embodied as a diaphragm. According to the invention, the radiation limiting means is displaceably mounted on a plane in a perpendicular manner in relation to a defining bundle of rays, and comprises a plurality of differently shaped diaphragm apertures for continuously limiting the different bundle of rays. It can, for example, be embodied as an essentially rotation-symmetrical perforated disk. In another embodiment, the radiation screen comprises two radiation defining means which are arranged in an overlapping manner in the direction of the bundle of rays which are to be defined.
Claims18
A radiation diaphragm operative to narrow an x-ray beam produced by an x-ray tube of an x-ray facility to form a narrowed beam and to mask out regions outside the narrowed beam, the radiation diaphragm comprising:
- at least two radiation defining devices,
- wherein the at least two radiation defining devices are mounted on different central axis supports in a displaceable manner in planes perpendicular to the x-ray beam, and each of the at least two radiation defining devices includes a plurality of different diaphragm apertures with different shapes for differently contoured definition of the x-ray beam,
- wherein the plurality of different diaphragm apertures adjust the contour of the narrowed beam, and
- wherein each diaphragm aperture of one of the at least two radiation defining devices is disposable within the periphery of at least one diaphragm aperture of another of the at least two radiation defining devices.
An x-ray facility comprising:
- at least two radiation diaphragms that include a plurality of different diaphragm apertures, the plurality of different diaphragm apertures operable to define a shaped beam in different contours,
- wherein each of the at least two radiation diaphragms is displaceable in a plane perpendicular to the shaped beam,
- wherein each of the at least two radiation diaphragms is operative to narrow an x-ray beam produced by an x-ray tube of the x-ray facility to form the shaped beam and to mask out regions outside the shaped beam,
- wherein the at least two radiation diaphragms are mounted on different central axis supports,
- wherein the plurality of different diaphragm apertures adjust the contour of the shaped beam, and
- wherein each diaphragm aperture of one of the at least two radiation diaphragms is disposable within the periphery of at least one diaphragm aperture of another of the at least two radiation diaphragms.
Dependencies are inferred from the claim text.