Abstract: Metal collar device of the type used for integrating a glass part and a metal part of different coefficients of expansion. The collar is circular and comprises a first portion intended to be in contact with the metal part, a second portion intended to be in contact with the glass part and a bonding portion placed between said first and second portions. The second portion is not as thick as the first portion and as the bonding portion, so that it can adjust to the expansion of the glass part by exerting stresses on the latter below the limit of resistance of said glass part.

Abstract: A system for the cooling of a fixed anode for an X-ray tube placed in a radiogenic unit comprising a cooling fluid circuit that passes into the anode and extends along the surfaces of the mount that are adjacent to the radiogenic unit, such as the yoke bearing said unit. Application to single-pole and two-pole X-ray tubes.

Abstract: Disclosed is a rotating anode for a composite X-ray tube formed by two half-anodes, each being in the form of a disk, one face of which is flat and the other face of which is cut out into radial notches that join their indented circumference to the center of said half-anodes which fit into each other by their indented faces and are fixedly attached by a mechanical fixing system.

Abstract: The disclosure concerns anodes for X-ray tubes. The disclosed anode for an X-ray tube has a body or substrate on which a target is provided by a layer of target material, wherein said anode comprises at least one layer that is interposed between said substrate and said target layer and is constituted by a material having greater plasticity than the material forming the substrate and the target material.

Abstract: The invention relates to an X-ray tube used to obtain radiological images in which sharpness and contrast are improved. To this end, the X-ray tube has an anode consisting, at least partially, of a massive layer made of an X-ray emitting material in which at least one hollow part demarcates a surface exposed to a beam of electrons.

Abstract: An X-ray emitting device of the X-ray unit type is disclosed, the arrangement of which simplifies maintenance problems. The emitting device has a metallic casing containing an X-ray tube and supply means. According to a feature of the invention, the X-ray tube and the supply means are contained in a first and second imperviously sealed chamber, filled with oil.

Abstract: The invention pertains to a rotating anode with graphite for an X-ray tube in which the quality of the bond with the graphite is considerably improved in comparison with the prior art, through the use of a bonder element comprising beryllium.

Abstract: A radiological device is provided of the type comprising a radiogenic tube with magnetic bearings, said radiogenic tube being contained in a sheath as well as electronic means for controlling said magnetic bearings.

Abstract: A device is disclosed for the cooling of an X-ray tube contained in a casing, using a fluid put into forced circulation in a cooling circuit comprising a heat exchanger. The device of the invention can be used to obtain efficient cooling while, at the same time, using a small volume of fluid and a heat exchanger of smaller size than in the prior art. To this end, the cooling circuit comprises means to, firstly, store a quantity of heat accumulated by the fluid when the latter reaches a pre-determined temperature during an examination period and, secondly, to restore this quantity of heat during an idle period which follows the examination period.

Abstract: The present invention concerns an X-ray examination apparatus allowing to produce images of an object through the scanning of the object by at least two fan-shaped beams having different energy spectra, and obtained from a single X-ray source, thereby allowing to obtain simultaneously images of the object adapted to contain different informations.

Abstract: An x-ray tube for producing a high-efficiency beam and especially a pencil beam as applicable to the field of radiology and more especially digital radiology comprises an anode provided with a rectilinear bore and a cathode for generating an electron beam which enters the bore. The internal walls of the bore constitute an anode target which is bombarded by the electron beam in order to produce at least one x-ray beam which emerges from one end of the bore.

Abstract: The invention relates to a rotating anode X-ray tube provided with a charge flow device, in which the anode current of the tube is established between an emitter coupled in rotation to the rotating anode, as well as a fixed collector. The latter is electrically connected to high voltage and the emitter is electrically connected to the rotating anode, having at least one part with a tapered end constituting an electron emissive zone. These electrons are trapped by the collector, so as to establish the anode current of the tube without any material contact between the emitter and the collector. The invention is applicable to radiology in general and more specifically to medical diagnosis.

Abstract: The invention provides a general purpose X-ray tube for stereography usable in the field of radiology. An X-ray tube of the invention comprises at least three independent cathodes, each allowing a source of an X-ray beam to be obtained. These sources are at different distances from each other, so as to form working pairs allowing stereographic pictures to be taken of a subject with different enlargement values.

Abstract: A universal limiter for any type of x-ray tube used in radiology or radiation therapy comprises an envelope of conical shape whose axis coincides with the axis of symmetry of the useful beam of radiation. The limiter is formed of material which is opaque to secondary radiation. The inlet aperture of the limiter is located in the immediate vicinity of the emitting focal spot and the outlet aperture of the limiter is connected mechanically to the exit window of the x-ray tube.

Abstract: A rotating-anode X-ray tube for producing a flat wide-angle fan-shaped beam with a substantially uniform distribution of energy comprises a cylindrical anode and a cathode axially or peripherally offset from the target area or focus bombarded by the electrons so that the axis of the fan-shaped beam emitted by that area can extend radially to the cylindrical anode surface. An arcuate shield closely paralleling this cylindrical surface is apertured at its center in front of the focus and intercepts stray electrons which would be liable to bombard the anode at points outside the target area so as to give rise to extra-focal radiation. Such a tube is useful in apparatus designed for axial transverse tomography.

Abstract: A multiple cathode X-ray tube for densitometers.This tube contains an anode assembly functioning by transmission, which is arranged along the sides of a regular convex polygon, with several cathodes, each of which sweeps one side of the polygon and a collimation device with several openings placed in front of the anode assembly to produce a series of fine, parallel and coplanar beams, the number of beams being equal to the number of openings. Such a tube makes very fast tomography possible.

Abstract: A hollow, cylindrical, rotating anode, X-ray tube for tomodensitometers.This tube contains a bell-shaped, hollow, cylindrical anode functioning by transmission, which is swept on its inner surface by an electron beam and produces in cooperation with a collimation device having several openings a series of fine X-ray beams, which are roughly parallel and coplanar, the number of these beams being equal to the number of openings in the collimation device. Such a tube makes very fast tomography possible.