Patent Number: 059237244
Section: abstract

In a medical X-ray diagnostic installation and a method for operating same, an X-ray source has a filter means optionally introducible into its beam path and emits X-rays which strike a detector having individual pixel elements and which generates image signals pixel-by-pixel dependent on the received radiation. The detector is followed by a signal processing chain which includes processing meansfor image generation and output, first and only image exposure of the examination subject initially ensues without the filter means introduced into the beam path, after which the image signals obtained from one or more picture element regions of the received image are processed pixel-by-pixel for generating a calculated image corresponding to the image of those regions which would be obtained with the filter means in the beam path, using signals which identify a position of the filter means in the beam path. The processed signals are combined with the unprocessed signals for the remainder of the original image to produce a calculated image, which is supplied as an output for display. The production of a second, actual exposure employing X-rays with the filter means in the beam path is thus avoided, thereby saving time and reducing the patient's overall X-ray dose.