Method for providing form filter for use in X-ray image pickup device e.g. X-ray computed tomography, involves determining corresponding thickness of form filter using determined thickness of image object based on size of beam

摘要

The method involves defining a position of the image object (O) so that the thickness (x) of image object and thickness (b) of form filter (Ff) is assigned corresponding to the beam (S) from an X-ray source (Q). The size of the beam is defined. The selected beams from the X-ray source are emanated in desired condition. The corresponding thickness of the form filter is determined using a determined thickness of the image object based on the size of beam. The form filter with specific thicknesses is provided. An independent claim is included for form filter.