AN X-RAY EXAMINATION APPARATUS HAVING AN OBJECT ABSORPTION DEPENDENT BRIGHTNESS CONTROL

摘要

An X-ray examination apparatus includes means for generating an X-ray image of an object, which X-ray image generating means have a brightness control input, and image processing means coupled to the X-ray image generating means in order to output a brightness control signal to said control input. The X-ray image generating means are provided with an X-ray data output, the image processing means are provided with an X-ray data input coupled to the X-ray data output, and the image processing means are arranged as calculating means for calculating absorption properties of the object and for generating the brightness control signal in dependence on said absorption properties. Intelligent measuring field selection is now possible on the basis of calculated absorption properties of identifiable objects or parts of objects reproduced in the visible image. Image quality is improved because the brightness control is based on more intelligently selected measuring fields.