Thomson-csf

Compagnie Generale De Radiologie

Jacques Dale

Jean Caugant

A compact load-bearing slide assembly, especially for use in an X-ray installation. This assembly substantially comprises two supports 1, 3, the second of said supports 3 bearing the load. The two supports are coupled laterally by a median carriage 2. The assembly is able to be extended telescopically under the action of first actuating means 9 moving the carriage with respect to the first support, and second actuating means 13 moving the second support with respect to the carriage. The novel slide assembly is especially advantageous when used for cardiovascular X-ray examination.

Load-bearing telescopic slide assembly and X-ray installation equipped

The definition diaphragm for the X-ray beam located at the image receiver serves to eliminate part of the stray radiation. According to the invention, the diaphragm comprises a frame and a plurality of partial overlap members each having one portion made from lead rubber, so that it can be turned down perpendicular to the plane of the opening, so that the radial dimensions of the diaphragm are reduced to a minimum. Application is to conventional radiology.

Diaphragm for defining a radiation beam

A film changer especially for X-ray diagnostic apparatus permitting exposure at rapid frame rates. The film changer includes a supply magazine holding a stack of sheet film, a transfer device for transferring a sheet of film into an exposure station including a fixed and a movable pressure plate covered on the adjacent faces by intensifying screens, and an ejection device for ejecting exposed films into a receiver magazine. The displacements of the movable plate to and from the fixed one are controlled by means of two pairs of cams rotating on parallel shafts as the plates have to be pressed to each other during exposure and moved apart during ejection and loading. The transfer and ejection devices have permanently rotating rollers cooperating with pressure cylinders. The pressure cylinder associated with the ejection rollers is movable to and away from the latter by means of further cams synchronized with those acting on the movable pressure plate so that ejection occurs before loading. The transfer device is fed by an extractor which is coupled to the movable pressure plate, so that only its movement away from the fixed plate feeds a single sheet of film to the transfer device.

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Paris, France

Jacques Dale