Abstract: The disclosure relates to an x-ray examination apparatus comprising an examination table, a patient support platform resting on the examination table, an x-ray source, a remotely directed collimator for restricting the radiation beam according to cassette size (film format), a longitudinal transport carriage movable along the length of the patient support platform, and a cassette drawer capable of insertion in the longitudinal transport carriage, with clamping jaws for the purpose of the support-mounting of an insertable x-ray film cassette. In order to render possible a free removal of the cassette drawer during fluoroscopy, in spite of the necessary transmission of the scanned cassette dimensions for the purpose of collimator adjustment during radiography, the longitudinal transport carriage carries two sensors, coupled with one mechanical-electrical transducer each, for sensing the length and width of the x-ray film cassette clamped in the inserted cassette drawer.

Abstract: An X-ray examination apparatus including an examination table, an X-ray source having remote-controllable focusing means for the X-radiation, a cassette drawer which is insertable below the patient's support platform of the examination table, including clamping means for the X-ray film cassette, and means for converting the cassette dimensions which are determined by the clamping means into electrical values for effecting the control of the focusing means.