Siemens Aktiengesellschaft

Helmut Schott

Hartmut Duschka

Dieter Adelmeyer

Christian Walling

A target device for an X-ray examination installation has a cassette carrier which permits loading of an X-ray film cassette therein from the left or the right, the cassette carrier is movable from a ready position at a right of the installation through at least one exposure position and to a left side loading position. The cassette carriage has two clamping jaws disposed parallel to each other in a regulating plane, the jaws being two-dimensionally displaceable relative to each other in the regulating plane. The carriage further has a detent for fixing the position of the X-ray film cassette in the longitudinal direction of the clamping jaws. The clamping jaws are urged against each other in the right side loading position by a bias spring, and are urged apart in the left side loading position. A clamping slide having a projection extending into the regulating plane of the device between the clamping jaws is moveable within the cassette carriage in the longitudinal direction of the clamping jaws.

Target device for an X-ray examination installation

In an exemplary embodiment displaceable clamping jaws mount x-ray film cassettes of varying format for movement into the exposure position. In the case of such x-ray cassette changers it is necessary that the width-definition of the cone of rays corresponds to the dimensions of the inserted x-ray film cassette. The film support, in the case of fluoroscopy, should be capable of being removed from the examination apparatus without difficulties. For this purpose, the disclosure provides that the film support and the clamping jaws are coupled with transmitters which assume positions with respect to a displacement direction of the film support in dependence on the clamping positions of the respective pairs of clamping jaws. Associated with the transmitters are receivers which, together with an actual value transmitter responsive to movement of the film support, are connected to a measured value processing arrangement. The disclosure radiographic installation is particularly suited for utilization with under-table spot film devices.

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Fuerth, Germany

Helmut Schott