An X-ray examination apparatus (1), including an X-ray source (2) and an X-ray detector (5), is provided with an X-ray filter (6) which is arranged between the X-ray source and the X-ray detector. The X-ray filter (6) includes a plurality of filter elements (7) whose X-ray absorptivity can be adjusted by adjustment of a quantity of X-ray absorbing liquid (14) within the individual filter elements; a first end of individual filter elements communicates with the X-ray absorbing liquid whereas a second end communicates with an X-ray transparent liquid (12). The X-ray filter is preferably provided with a pressure control system for independent control of the liquid pressure in individual row ducts (11) and individual column ducts (13). Individual filter elements are preferably provided with a piston for separating the X-ray absorbing liquid from the X-ray transparent liquid.
申请公布号
WO9938172(A2)
申请公布日期
1999.07.29
申请号
WO1999IB00053
申请日期
1999.01.18
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;PHILIPS AB
发明人
SCHILLER, CHRISTOPH;DE SAMBER, MARK, A.;FOKKINK, LAMBERTUS G., J.