Fluorescent screen for X ray detection and preparation method thereof

An X-ray and fluorescent screen technology, applied in the field of X-ray detection, can solve the problems of high cost, complex preparation process, and no fluorescent screen preparation method, etc., and achieve the effects of low production cost, simple preparation process and high resolution

Pending Publication Date: 2017-02-01
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Im deok Jung (Im Deok Jung, Min Kook Cho, Sang Min Lee, etc., Flexible Gd2O2S: Tb ​​scintillators pixelated with polyethylene microstructures for digital x-ray image sensors, J.Micromech.Microeng.19(2009)015014) and JongyulKim( Jongyul Kim, Bo Kyoung Cha, Jun Hyung Bae, etc., Fabrication and characterization of pixelated Gd2O2S: Tb ​​scintillator screens for digital X-ray imaging applications, Nuclear Instruments and Methods in Physics ResearchA 633 (2011) S303-S305) reported that t...

Method used

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  • Fluorescent screen for X ray detection and preparation method thereof
  • Fluorescent screen for X ray detection and preparation method thereof
  • Fluorescent screen for X ray detection and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0032] To prepare the above-mentioned fluorescent screen, it is first necessary to prepare the slurry for the reflective layer and the fluorescent layer. Fluorescent layer 3 uses gadolinium oxysulfide powder as phosphor, and its chemical formula is: (Gd 1-x-y Tb x Dy y ) 2 o 2 S, where x=0.005, y=0.005. The morphology of gadolinium oxysulfide powder is as follows image 3 As shown, the particle size of the powder is about 2-10μm, such as Figure 4 . Measure 30 g of gadolinium oxysulfide powder, 0.3 g of herring oil as a dispersant, 25 g of ethyl acetate as an organic solvent, 1.8 g of PVB as a binder, and 1.2 g of PEG-400 as a plasticizer, mix by ball milling, and the milling speed is 120 r / min, the time is 6h, and the slurry for preparing the fluorescent layer 3 is obtained. Select TiO2 as the powder for preparing the reflective layer 2, measure 10g TiO2, 0.1g herring oil as a dispersant, 35g ethyl acetate as a solvent, 0.6g PVB as a binder, and 0.4g PEG-400 as a pla...

Embodiment 2

[0035] The gadolinium oxysulfide powder used is the same as in Example 1. Measure 30g of gadolinium oxysulfide powder, 0.3g of herring oil as a dispersant, 10g of ethyl acetate and 10g of ethanol as an organic solvent, 1.8g of PVB as a binder, and 1.2g of PEG-400 as a plasticizer. 120r / min, ball milling time 4h, to obtain the slurry for preparing the fluorescent layer 3 . TiO2 is selected as the powder for preparing the reflective layer 2 . Measure 10g TiO2, 0.1g herring oil as dispersant, 12g ethyl acetate and 12g ethanol as solvent, 0.6g PVB as binder, 0.4g PEG-400 as plasticizer, mix by ball milling, ball milling speed is 120r / min, ball milling The time is 4 hours, and the slurry for preparing the reflective layer 2 is obtained.

[0036] After obtaining the slurry for preparing the fluorescent layer and the reflective layer, the steps for preparing the above-mentioned fluorescent screen are the same as in Example 1.

Embodiment 3

[0038] The gadolinium oxysulfide powder used is the same as in Example 1. Measure 30g of gadolinium oxysulfide powder, 0.3g of herring oil as a dispersant, 10g of ethyl acetate and 10g of ethanol as a solvent, 1.8g of PVB as a binder, 1.2g of PEG-400 as a plasticizer, ball milling, 120r / min , 4h, to obtain the slurry for preparing the fluorescent layer 3 . TiO2 is selected as the powder for preparing the reflective layer 2 . Measure 10g TiO2, 0.1g herring oil as dispersant, 10g ethyl acetate and 10g ethanol as organic solvent, 0.6g PVB as binder, 0.4g PEG-400 as plasticizer, mix by ball milling, the ball milling speed is 120r / min, The ball milling time was 4 hours, and the slurry for preparing the reflective layer 2 was obtained.

[0039] After obtaining the slurry for preparing the fluorescent layer and the reflective layer, the steps for preparing the above-mentioned fluorescent screen are the same as in Example 1.

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Abstract

The invention discloses a fluorescent screen for X ray detection. The fluorescent screen comprises a support layer and a fluorescent layer supported on the support layer; and the fluorescent layer contains gadolinium oxysulfide. Meanwhile, the invention also discloses a method for preparing a fluorescent screen. The fluorescent screen made of gadolinium oxysulfide can emit visible light after absorbing an X ray; and on the basis of cooperation with a photoelectric converter, photoelectric conversion of the X ray is realized. When the fluorescent screen is prepared by the preparation method, advantages of simple process and low cost are realized.

Description

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Claims

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Application Information

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Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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