Patent Number: 
Section: claims

1. An apparatus for filtering an x-ray beam emitted by an x-ray source, the apparatus comprising:a filter, adjustable from a parked position (P) outside of a path of the x-ray beam into a filtering position (F) in the x-ray beam path; anda first sensor device for detecting the filter in the filtering position (F), and a second sensor device for detecting the filter in the parked position (P),wherein the first and second sensor devices are operable to communicate sensor signals to an evaluation device, the evaluation device operable to generates a report if the filter is not in at least one of the parked position (P) and the filtering position (F). 2. The apparatus of claim 1, wherein the first and second sensor devices comprise photoelectric gates. 3. The apparatus of claim 2, wherein the first and second sensor devices for the filters are photoelectric gates, and wherein the filters is a copper filter. 4. The apparatus of claim 1, wherein the filter comprises a copper filter. 5. The apparatus of claim 1, further comprising:a drive device for moving the filter. 6. The apparatus of claim 1, further comprising:a housing where a multileaf diaphragm assembly, the filter and the first and second sensors are disposed in the housing. 7. The apparatus of claim 6, wherein a drive device for moving the filter is disposed in the housing. 8. The apparatus of claim 1, wherein the apparatus is embodied in an x-ray system such that an operation of the x-ray system is interrupted if the evaluation device generates the report. 9. The apparatus of claim 8, wherein a signal perceptible to the operator is output if the evaluation device generates the report. 10. The apparatus of claim 9, wherein the signal is optical or acoustical. 11. An imaging x-ray system having an x-ray source and an apparatus for filtering an x-ray beam emitted by the x-ray source, the system comprising:a plurality of filters, each independently adjustable from a parked position P) outside of a path of the x-ray beam into a filtering position (F) in the x-ray beam path, and each of the plurality of filters having corresponding first and second sensor devices, wherein each corresponding first sensor device detects whether the respective one of the plurality of filters is in the filtering position (F), and each corresponding second sensor device detects whether the respective one of the plurality of filters is in the parked position (P); andan evaluation device, wherein the first and second sensor devices are operable to communicate sensor signals to the evaluation device, the evaluation device operable to generates a report for each one of the plurality of filters that is not in at least one of the parked position (P) and the filtering position (F). 12. The apparatus of claim 11, wherein the first and second sensor devices for each of the plurality of filters are photoelectric gates. 13. The system of claim 11, wherein each of the plurality of filters is a copper filter. 14. The system of claim 11, further comprising a drive device for moving each of the plurality of filters. 15. The system of claim 11, wherein the first and second sensor devices for each of the plurality of filters are photoelectric gates and wherein each of the plurality of filters is a copper filter. 16. The system of claim 15, wherein the system and a multileaf diaphragm assembly are disposed in a common housing. 17. The system of claim 16, wherein an operation of the x-ray imaging system is interrupted if the evaluation device generates the report. 18. The system of claim 11, wherein the system and a multileaf diaphragm assembly are disposed in a common housing. 19. The system of claim 11, wherein an operation of the x-ray imaging system is interrupted if the evaluation device generates the report. 20. The apparatus of claims 19, wherein a signal perceptible to the operator is output if the evaluation device generates the report.