北京生物醫(yī)學工程

應(yīng)用于平板探測器的 GOS 熒光屏的研究現(xiàn)狀

Research status of GOS scintillator screen applied to flat panel detector

作者：張文樺張迎李偉林琳

單位：上海理工大學醫(yī)療器械與食品學院( 上海 200093) 上海健康醫(yī)學院納米技術(shù)與健康研究院(上海 201318) 納米技術(shù)及應(yīng)用國家工程研究中心(上海 200241)

關(guān)鍵詞：間接型平板探測器; GOS; 空間分辨率; 量子探測效率

分類號：R318.04

出版年·卷·期（頁碼）：2020·39·3（321-326）

摘要：

自 20 世紀 80 年代以來,數(shù)字 X 線成像設(shè)備廣泛應(yīng)用于醫(yī)療領(lǐng)域? 在數(shù)字 X 射線成像系統(tǒng)中,平板探測器將攜帶病患信息的 X 射線轉(zhuǎn)化成可被檢測并表達的數(shù)字信號,是整個數(shù)字 X 射線成像系統(tǒng)的關(guān)鍵部件? 平板探測器從工作機制上可劃分為兩種:一種是將 X 射線直接轉(zhuǎn)換成電荷信息的直接型探測器;另一種是將 X 射線先轉(zhuǎn)換成可見光光子,并通過電荷耦合器件或薄膜晶體管陣列收集,然后將收集到的可見光光子轉(zhuǎn)換成電荷信號的間接型探測器? 間接型探測器中熒光材料必不可少,目前商用的熒光材料主要碘化銫和硫氧化釓? 碘化銫已經(jīng)基本實現(xiàn)了國產(chǎn)化,硫氧化釓的性能仍有需要優(yōu)化和提高的方面? 本文以應(yīng)用于間接型探測器的硫氧化釓(Gd2O2 S,GOS)熒光屏為研究對象,綜述了其結(jié)構(gòu)與原理?制備工藝?主要特性及影響其成像性能的主要因素,并展望了間接型平板探測器發(fā)展的新方向?

Since the 1980s, digital X?ray imaging equipment has been widely used in the medical field information into a digital signal that can be detected and expressed,which is the key component of the whole digital X?ray imaging system is the direct detector that directly converts X?ray into charge information; the other is the indirect detector that first converts X?ray into visible light photon and collects it through charge?coupled device or thin?film transistor array,and then converts the collected visible light photon into charge signal.At present, the main commercial oxysulfide to be optimized and improved2O2 S,GOS) scintillator screen used in indirect detector is taken as the research object characteristics and main factors affecting its imaging performance are summarized,and the new development direction of indirect flat panel detector is prospected.

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