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COMPUTER TOMOGRAPHY HEATER HOMOGENIZING SOLUTION BY INTEGRATED GRAPHGENE HEAT SPREADER

IP.com Disclosure Number: IPCOM000238430D
Publication Date: 2014-Aug-26
Document File: 5 page(s) / 431K

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention includes a technique to reduce thermal risk to a detector in a computer tomography (CT) system. The technique includes a diode and a heat source placed on different sides of a circuit board. A graphene is embedded in the circuit board. The graphene is one-atom thick layer of layered mineral graphite. The graphene thickness is 0.025mm and insert to different layers while attaching different layers of the circuit board together by epoxy. This allows the diodes in a wide flat module plane to be in similar temperature range without heavy mass, packing structure dimension change and assembly process change. When heat is generated by different application-specific integrated circuit (ASIC) in different positions, the heat transfers to lower temperature position by the graphene and consequently uniforms temperature on the CT diode.

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COMPUTER TOMOGRAPHY HEATER HOMOGENIZING SOLUTION BY INTEGRATED GRAPHGENE HEAT SPREADER

FIELD OF INVENTION

The invention generally relates to a detector in a computer tomography system and more particularly to an integrated graphene layer as heat spreader in the detector in the CT system.

BACKGROUND OF THE INVENTION

A computer tomography system includes an X-ray source and an X-ray detector array. The X-ray source and the X-ray detector array are mounted on opposite sides of a gantry with an imaging area interposed in between. The detector converts X-rays into electrical signals. The detector includes several detector modules. More number of slices on the detector signifies more heat power possession. However, electronic components of the computer tomography (CT) detector generate considerable amount of heat. The detector is sensitive to heat generated by electronic components, such as, from an alternating current (AC) converter. The AC converter is positioned adjacent to a photodiode. A collimator is misaligned with a scintillator due to temperature change. The photodiodes overheats and damages when exposed to large temperature change.

As illustrated in contour image depicted in FIG. 2, it is observed that the highest temperature change occurs in module in both X-direction edges.

A conventional technique includes a wide flat module segment CT detector with several pixel arrays. Based on current wide flat module segment CT detector design as depicted in FIG. 1, a graphical representation of the diode temperature distribution is depicted in FIG. 2.

FIG. 1

FIG. 2

As illustrated in contour image depicted in FIG. 2, it is observed that the highest temperature change occurs in module for both cases in X-direction edges. The detector includes 136 channels in X-direction. However, the conventional technique provides thermal risks due to long X-direction plane and different power in different position around diode.

Hence there exists a need for an efficient technique to reduce thermal risk to the detector in the CT system.

BRIEF DESCRIPTION OF THE INVENTION

The invention includes a technique to reduce thermal risk to a detector in a computer tomography (CT) system. The technique includes a diode and a heat source placed on different sides of a circuit board. A graphene is embedded in the circuit board. The graphene is one-atom thick layer of layered mineral graphite.

DETAILED DESCRIPTION OF THE INVENTION


The invention includes a technique to reduce thermal risk to a detector in a computer tomography (CT) system. The technique includes a diode and a heat source placed on different sides of a circuit board. A graphene is embedded in the circuit board. The graphene is one-atom thick layer of layered mineral graphite. The graphene thickness is 0.025mm and insert to different layers while attaching different layers of the circuit board together by epoxy. T...