Patent ID: 6584173
Filing Date: 2003-06-24
Classification: G21K

Abstract:
An X-ray examination device comprising an X-ray source and an X-ray detector, for forming an X-ray image of an object to be examined by exposure of said object to X-rays, an X-ray filter, which is arranged between the X-ray source and the X-ray detector for filtering the X-rays passing through said object, and adjusting means, which are connected to the X-ray filter for adjusting the X-ray filter, said adjusting means comprising a graphics device, cursor control means for defining a region of interest in an image of said object displayed on said graphics device, and processing means connected to the X-ray filter for calculating the region of interest and adjusting the filter accordingly, the X-ray filter including a plurality of filter elements having an X-ray absorptivity which can be adjusted by controlling a quantity of X-ray absorbing liquid within the individual filter elements, the filter elements are capillary tubes, and said X-ray examination device further comprising means for applying electric voltages to the individual capillary tubes for controlling the quantity of X-ray absorbing liquid therein.