X-ray examining device.

摘要

An X-ray examining device in accordance with the invention includes an X-ray source, an object carrier, an X-ray detector and a curved stray radiation grid which is arranged between the object carrier and an entrance window of the X-ray detector. In order to obtain images at different irradiation angles, rotation of X-ray source and X-ray detector about, for example a patient to be examined is necessary. In inclined positions of the X-ray detector, however, imaging is not optimum because the distance between the X-ray source and the entrance screen of the X-ray detector must be increased because of the customary flat shape of the stray radiation grid. Moreover, the stray radiation grid will also absorp a comparatively large amount of X-rays when the X-ray detector is not ideally positioned. These drawbacks are eliminated when use is made of a stray radiation grid in which either the direction of curvature is identical or opposed to that of the curvature of the entrance window of the X-ray detector, or the direction of curvature is identical to that of the curvature of the object carrier.