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Sesquioxide transparent ceramic scintillation screen for X-ray imaging detector and application of screen

An imaging detector and sesquioxide technology, applied in the field of X-ray imaging, can solve the problems of limited selection of scintillators, inability to accurately optimize X-ray absorption of different energies, etc., to achieve easy preparation in large areas, improve imaging effects, and optimize absorption The effect of efficiency

Pending Publication Date: 2021-12-17
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] According to one aspect of the application, the present invention aims at the problem that the selection of scintillators in current dual-energy or multi-energy X-ray imaging systems is limited, and it is impossible to accurately optimize the absorption of X-rays with different energies, and provides a double-half X-ray imaging detector An oxide transparent ceramic scintillation screen comprising at least two scintillator layers;

Method used

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  • Sesquioxide transparent ceramic scintillation screen for X-ray imaging detector and application of screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (Gd 0.2 Y 0.75 Tb 0.05 ) 2 o 3 (200μm) / YSZ(200μm) / (Lu 0.85 La 0.1 Eu 0.05 ) 2 o 3 (600μm) scintillation screen

[0056] The upper scintillator is 200μm thick (Gd 0.2 Y 0.75 Tb 0.05 ) 2 o 3 , the split layer is 200μm YSZ, and the lower scintillator is 600μm (Lu 0.85 La 0.1 Eu 0.05 ) 2 o 3 , the cross section is 100×100mm 2 , Formed in one piece with transparent ceramic technology.

[0057] The scintillation vial of this embodiment was tested with a microscope objective lens NikonCFIPlanFluor, Numerical Aperture numerical aperture NA=0.13, X-ray source as W target (160KeV), and the system spatial resolution reached 10 μm. The above imaging system performs CT imaging of mixed materials of metal materials gold (Z=79) and lead (Z=82) with similar densities, which can better distinguish the two materials.

Embodiment 2

[0059] (Lu 0.1 Gd 0.1 sc 0.75 Tb 0.05 ) 2 o 3 (1mm) / (Lu 0.85 Gd 0.1 Eu 0.05 ) 2 o 3 (2mm) flickering screen

[0060] The upper scintillator is 1 mm thick (Lu 0.1 Gd 0.1 sc 0.75 Tb 0.05 ) 2 o 3 , without split layer, the lower scintillator is 2mm thick (Lu 0.85 Gd 0.1 Eu 0.05 ) 2 o 3 , the cross section is 100×100mm 2 , the upper scintillator and the lower scintillator are formed separately by transparent ceramic technology, and then combined to prepare.

Embodiment 3

[0062] (Lu 0.1 Gd 0.1 Y 0.75 T m 0.05 ) 2 o 3 (1mm) / YSZ(400μm)(Lu 0.5 La 0.35 Gd 0.1 Tb 0.05 ) 2 o 3 (2mm) / YSZ(400μm) / (Lu 0.8 La 0.05 sc 0.1 Eu 0.05 ) 2 o 3 (2.5mm)

[0063] The first layer of scintillator is 1mm thick (Lu 0.1 Gd 0.1 Y 0.75 T m 0.05 ) 2 o 3 , the first split layer is 400μm thick YSZ, the second scintillator is 2mm thick (Lu 0.5 La 0.35 Gd 0.1 Tb 0.05 ) 2 o 3 , the second split layer is 400μm thick YSZ, the third layer scintillator is 2.5mm thick (Lu 0.8 La 0.05 sc 0.1 Eu 0.05 ) 2 o 3 The cross section is 3000×3000mm 2 , It is prepared by integral molding of transparent ceramic technology.

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Abstract

The invention discloses a sesquioxide transparent ceramic scintillation screen for an X-ray imaging detector and application of the sesquioxide transparent ceramic scintillation screen. The scintillation screen comprises at least two layers of scintillators. The scintillator comprises (M1<x>M2<y>M3 RE<1-x-y-z>)2O3, wherein 0 < = x < 1, 0 < = y< 1 and 0 < = z < 1; M represents Lu, Gd, Y, La or Sc; RE represents Eu, Tb, Pr, Tm or Dy. By adjusting the sesquioxide mixed crystal components, the absorption efficiency of X-rays with different energies is optimized, the double-layer and double-color or multi-layer and multi-color transparent ceramic scintillation screen is obtained, the imaging effect of double-energy or multi-energy X-ray detection is improved, and large-area preparation is relatively easy.

Description

technical field [0001] The present application relates to the field of X-ray imaging, in particular to a sesquioxide transparent ceramic scintillation screen for an X-ray imaging detector and its application. Background technique [0002] The scintillation screen is the core component of the X-ray imaging detector. The traditional X-ray tomography (CT) technology uses a single-energy spectrum X-ray and a single-layer scintillation screen to image the object. The reconstruction result is only an attenuation coefficient image, sometimes resulting in two The imaging of two different materials is exactly the same, while dual-energy or multi-energy CT uses different energy spectrum X-rays to perform imaging, and can obtain information such as the atomic number of the object, thus becoming an important direction for the development of CT technology. [0003] Layered scintillation screen is one of the imaging methods of dual-energy or multi-energy CT. Its basic method is to adopt a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/20G01N23/046
CPCG01T1/2002G01N23/046
Inventor 冯鹤张志军
Owner SHANGHAI UNIV
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