Patent Number: 
Section: claims

1. A device, comprising:a positionable fastening unit;a housing unit disposed on said positionable fastening unit and including an X-ray source and a collimator unit arranged downstream of said X-ray source;said collimator unit including displaceable collimator plates for delimiting a collimation field of said collimator unit;a control unit for orienting said collimator unit together with said X-ray source, said control unit being configured to control said positionable fastening unit for rotating said collimator unit about a central beam of said X-ray source for aligning the collimation field with an examination region of interest. 2. The device according to claim 1, wherein, for orienting said collimator unit, said control unit controls said positionable fastening unit such that while maintaining an orientation of the central beam of said X-ray source, according to a position and orientation of the examination region of interest, a collimation field orientable thereto is rotated by way of said positionable fastening unit to thereby achieve a match between the examination region of interest and the collimation field. 3. The device according to claim 1, wherein said positionable fastening unit is formed of at least a first and a second movement unit mounted to a ceiling of a room and capable of travel in a plane. 4. The device according to claim 3, wherein said positionable fastening unit is a multi-jointed arm. 5. The device according to claim 3, which comprises a post of variable length mounted to said first or second movement units and having a free end, and a first connecting unit disposed on said free end, said first connecting unit being configured at least with one degree of freedom and having a connection to said housing unit with said X-ray source and said collimator unit arranged therein. 6. The device according to claim 1, wherein said X-ray source and said collimator unit are fixed relative to one another. 7. An x-ray adjustment method, comprising:providing a positionable fastening unit and a housing unit with an X-ray source and a collimator unit arranged downstream of the X-ray source arranged on the positionable fastening unit;displacing collimator plates of the collimator unit for delimiting a collimation field of the collimator unit;for orienting the collimator unit, controlling the positionable fastening unit to rotate the collimator unit together with the X-ray source while maintaining an orientation of a central beam of the X-ray source, to thereby align the collimation field with an examination region of interest until a match between the examination region of interest and the collimation field is achieved. 8. The method according to claim 7, wherein the positionable fastening unit is movable in a plane.