| 摘要 |
The invention concerns a method and apparatus for limiting a ray beam, especially in connection with an x-ray imaging equipment. The invention comprises a collimator construction in which a primary blade element ( 4 ) is moved directly by means of an actuator ( 3 ) and where at least one secondary element ( 5, 20 ) is movable in connection with the primary element ( 4 ), but does not move dependent on the movements of it when the distance between the said elements ( 4, 5, 20 ) is within at least one certain operating range concerning them.
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