| 摘要 |
The device is used for compensating a hyper transparency area due to air inside or outside an organ or any other object while using a gantry mounting radiography apparatus. The device comprises a three-dimensional compensating filter and a supporting assembly for connecting the filter in front of the X-ray source. The filter extends in a filter plane while the organ, or the object, defines a reference plane in which the rotation axis of the arms of the apparatus is substantially lying. The supporting assembly is designed to keep the filter in front of the X-ray source and in registered position with the X-ray source and the hyper transparency area while keeping the filter plane parallel to the reference plane during rotation of the arms around their axis. Contrary to existing X-ray compensating devices which are stationary, the present invention automatically sets itself for radiography of different views in function of the rotation of the arms of the apparatus.
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