General Electric Company

Ge Medical Systems Global Technology Company, LLC

Gwenael Lemarchand

Jean-Marie Penato

Frédéric Dahan

Philippe Blin

Christelle Gaudin

Isabelle Berangere Rouzou

Pascal Bonnafour

Thierry Toledo

Jean-Louis Penato

A method for controlling emission of a beam of electrons in an X-ray imaging tube. The X-ray imaging tube has an anode and a cathode. The method comprises a step in which at least one emission device included in the cathode emits an accelerated incident beam of electrons onto an impact focal spot on the anode to generate X-rays. An emission device is associated firstly with an assembly of polarizing plates and secondly with a focusing cup. An electric generator simultaneously applies a beam focusing voltage to the assembly and/or to the cup to control a characteristic dimension of the focal spot, and a cut-off voltage to the cup to control the emission of the beam by the device. The invention also concerns a corresponding cathode, tube and imaging system.

Method to control the emission of a beam of electrons in a cathode, corresponding cathode, tube and imaging system

A medical imaging system including a support, an X-ray emitting tube, and, facing the latter, a detector, the X-ray emitting tube being intended to accept displacements relatively to at least one portion of the support, the system also including a remote piece of equipment providing circulation of an oil intended to provide cooling and electric insulation of the X-ray emitting tube on the one hand, pipes in which said oil circulates, connecting the remote piece of equipment and the X-ray emitting tube, and a device for dehydrating the oil on the other hand, wherein the dehydration device includes means positioned in the circuit through which the oil flows during normal use of said imaging system and which provide or maintain dehydration of said oil during this use.

Medical imaging system with a remote fluid coolant circulation pump relatively to its X ray emitting tube

A method for the manufacture of a cathode filament of an X-ray tube and an X-ray tube formed by the method wherein the filament has at least two legs and one body, the filament being a single-piece filament. Spraying at least one material on a support by plasma spraying or by another deposition technique to obtain the filament molded on the support and separating the filament obtained from the support. The filament obtained has a variable thickness and a variable composition. The thicknesses of the legs and of the body as well as the composition of the filament can be modified according to the user's needs.

Method for the manufacture of an X-ray tube cathode filament

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Limours, France

Gwenael Lemarchand