Abstract: The invention relates to diaphragm means arranged close to the film in an X-ray spot film device. The diaphragm means comprises a first diaphragm with several rectangular aperture sections. The sections are displaced in the horizontal direction and have different vertical dimensions. A second diaphragm assembly has vertically extending diaphragm edges. By moving the first diaphragm to different positions in the radiation path, the aperture can be adapted to exposure formats of different vertical dimensions.

Abstract: In an X-ray examination apparatus comprising an examination table which can be tilted around a horizontal shaft, a mechanical coupling between the X-ray source and the image section is replaced by a coupling between the table and the image section, the image intensifier being connected to a ceiling-mounted stand. Motors for vertical and horizontal displacement and rotation are provided. The three motors are controlled by an arithmetic device so that when the examination table is swivelled, the location and position of the image section with respect to the examination table is not changed. In an examination apparatus of this kind, the construction of the examination table may be substantially lighter, because the image section and the counterweights need not be supported by the examination table. The image section can be displaced in a larger area perpendicular to the top of the patient examination table and the patient can be introduced into the apparatus from the left as well as from the right.

Abstract: An X-ray apparatus comprising a film holder which is displaceable between a number of recording positions and a parking position and which can be locked in each of the recording positions by means of a latch co-operating in the parking position, with a catch which unlocks the latch and intermittently displaces the film holder to the next recording position.