Patent ID: 6181774
Filing Date: 2001-01-30
Classification: B29C,B29D,G21K

Abstract:
An X-ray examination apparatus, comprising:an X-ray source,an X-ray detector, andan X-ray filter which is arranged between the X-ray source and the X-ray detector, and which includes a plurality of filter elements whose X-ray absorptivity can be adjusted by adjustment of a quantity of X-ray absorbing liquid within individual filter elements, wherein the X-ray filter further comprises:a stack of deformable foils, wherein individual filter elements are formed by spaces between individual deformable foils arising when the stack of foils is expanded transversely to the surface of the foils, andneighboring foils being locally attached to one another,rigid plates between which the stack of deformable foils is arranged, the rigid plates being mechanically coupled to the stack of deformable foils, anda buffer member provided between the stack of foils and at least one of the rigid plates, said buffer member being contractable parallel to the surface of the foils,wherein individual filter elements are formed by spaces between individual deformable foils in the stack of foils arising when the stack of foils is expanded transversely to the surface of the foils.