The present embodiments relate to a lifting drive for a radiation filter in a mammography device. The present embodiments also relate to a mammography device with a lifting drive.
Mammography devices may be used for fluoroscopy of an object to be examined, for example, a female breast. Mammography devices may feature a radiographic source and a radiation detector. The object to be examined is positioned between the radiographic source and the detector. Scattered radiation is predominantly caused by deflection of the examination rays in the x-rayed object under examination. Scattered radiation is especially problematic when x-raying thicker objects. To reduce the radiation scattering at the detector, an anti-scatter grid is usually arranged behind the object under examination and in front of the detector.
Anti-scatter grids may cause stripes or grids of noise on the examination image recorded in the detector. To reduce or eliminate these disturbance stripes, the anti-scatter grid is agitated slightly during the examination.
DE 3316003 A1 discloses a device for rectifying radiation scatter with an anti-scatter grid. The anti-scatter grid is moved back and forth once by a drive element as an image is recorded. A drive movement is created in a drive motor and converted via a fixed gear into an oscillating lifting movement of the anti-scatter grid.