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IMPREGNATED FOAM BASED THERMAL COMPOSITES FOR COMPUTED TOMOGRAPHY

IP.com Disclosure Number: IPCOM000239686D
Publication Date: 2014-Nov-25
Document File: 3 page(s) / 35K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a technique to dissipate or transfer heat from an x-ray tube component in the computed tomography (CT) system. The technique utilizes impregnated foam thermal composite in other thermal active CT system components such as spiral groove bearing (SGB) shaft, collector, magnet yoke/base, rotor, window heat sink, sound deadening in cabinet, cathode cup, heat exchanger, detector rail and heat sink, SGB components backplate or support plate or center plate and receptor. Molten metal, ceramic slurries, chemical vapor deposition (CVD) infiltrations or physical vapor deposition (PVD) are used to impregnate foams to form the composites.

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IMPREGNATED FOAM BASED THERMAL COMPOSITES FOR COMPUTED TOMOGRAPHY

FIELD OF INVENTION

The invention generally relates to a computed tomography (CT) system and more particularly to an impregnated foam thermal composite for the CT system.

BACKGROUND OF THE INVENTION

Efficient transport of heat away from source area provides a mechanism to decrease thermal gradient and negative affects of delta coefficient of thermal expansion (CTE). Increased energy input may be achieved in a device when waste heats are managed efficiently. Thermal management has direct correlation with improved performance and functional life of the computed tomography (CT) systems.  In the area of x-ray tubes, efforts are made to develop high heat dissipation capabilities. As a target directly interacts with the electron beam, there is a requirement to dissipate heat from the focal track region of the heated target. Contemporary x-ray targets employ Molybdenum-based material to form a structural member with a thin tungsten-based layer for x-ray generation. In many instances, rear side of the target consists of graphite as a light weight component to increase heat storage capacity and heat dissipation.

A conventional technique includes incorporation of diamond-metal composite materials into target designs. The thermal conductivity of the composites is tailored greater than conventional Molybdenum alloy utilized in target construction and presents an improved transport conduit for heat moving away from the focal track area.

A conventional technique includes utilization of metal or ceramic impregnated high thermal conductivity foams. However, the conventional techniques improve only thermal conductivity of the target in the x-ray tube.

 It would be desirable to have an efficient technique to improve thermal conductivity of other components in the x-ray tube.

BRIEF DESCRIPTION OF THE INVENTION

The present invention proposes a technique to dissipate or transfer heat from an x-ray tube component in a computed tomography (CT) system. The technique utilizes impregnated foam thermal composite in other thermal active CT system components. The impregnate are added to the foam using several techniques. Molten metal, ceramic slurries, chemical vapor deposition (CVD) infiltrations or physical vapor depositions are used to impregnate foams to form the. These techniques are utilized to grow layered material upon foam substrate.

DETAILED DESCRIPTION OF THE INVENTION

The present invention proposes a technique to dissipate or transfer heat from an x-ray tube component in a computed tomography (CT) system. The technique utilizes impregnated foam thermal composite in other thermal acti...