X-RAY EXAMINATION APPARATUS INCLUDING AN X-RAY FILTER

摘要

An X-ray examination apparatus (1) is provided with an X-ray source (2) and an X-ray detector (5) wherebetween there is arranged an X-ray filter (6) which includes filter elements (7) whose X-ray absorptivity can be adjusted by controlling the quantity of X-ray absorbing liquid (31) in individual filter elements (7). The filter elements (7) are formed by spaces between electrically conductive tracks (9) provided on parallel plates (8). The parallel plates are arranged in a reservoir (31) for the X-ray absorbing liquid. The liquid level in the vicinity of an electrically conductive track is controlled on the basis of an electric voltage applied to the relevant electrically conductive track (9).