X-Ray diagnostic device for fluoroscopic examination and film exposure

An x-ray diagnostic device for fluoroscopy and exposure, comprising an image intensifier television chain, a dose output control device for dose output regulation during fluoroscopy, circuit means for sensing fluoroscopic voltage, automatic exposure control means comprising a function generator connected with said circuit means and in which the course of the exposure voltage is programmed as a function of the fluoroscopic voltage, said circuit means supplying a signal corresponding to the respective fluoroscopic voltage to said function generator, said function generator having a plurality of programs stored therein, and manual selector means for manually selecting one of the stored programs, characterized in that a setting device (31, 32) for the free setting of the exposure voltage is present;

• and in that the automatic exposure control means (6, 8, 26) is responsive to a fixed setting of the exposure voltage by the setting device to override said stored programs and to adjust the x-ray tube current given constant exposure time for patient thicknesses that lie below a lower value (D.sub.1) and, for patient thicknesses exceeding this lower value, adjusts the exposure time given constant x-ray tube current.