Patent ID: 9649076
Date: 2017-05-16
CPC Classifications: A61B,G21K

Claim:
1. An X-ray computed tomography (=CT) apparatus, the apparatus comprising: an X-ray source emitting an X-ray beam or a divergent X-ray beam, along a beam axis; a stage for an object to be investigated with an attenuated X-ray beam; a filter element disposed between said X-ray source and said stage and attenuating said X-ray beam, said filter element having a spatially varying X-ray absorption capability along a cross direction which is perpendicular to both said beam axis and to a rotation axis, said spatially varying X-ray absorption capability exhibiting a maximum absorption along said cross direction at a zero position, wherein X-rays passing through said filter element at said zero position intersect said rotation axis; a 2D X-ray detector disposed downstream of said stage, said 2D X-ray detector having a detection area; and a gantry system structured to simultaneously rotate an entirety of said X-ray source, said filter element and said 2D X-ray detector about said rotation axis or structured to rotate said stage for the object about said rotation axis, wherein said rotation axis is perpendicular to said beam axis.