Patent ID: 7260180

Claim:
An x-ray examination apparatus comprising an x-ray source and an x-ray detector, the x-ray detector having a photoconductor to derive electric charges from incident x-radiation and read-out elements that derive electrical pixel-signals from the electric charges of the photoconductor and an output circuit to output the electrical pixel-signal from the read-out elements, wherein a central group of the read-out elements is located in a central region of the x-ray detector and a peripheral group of the read-out elements is located in a peripheral region that surrounds the central region, the x-ray examination apparatus further having a selection system to select the central group of read-out elements so as to supply pixel-signals from the central group of read-elements to the output circuit, wherein the selection system includes an x-ray shielding member that shields the peripheral region of the photoconductor from incident x-radiation.