X-ray imaging with photostimulable phosphors
X-ray imaging with photostimulable phosphors
复制标题
使用光激发荧光粉进行 X 射线成像
DOI：
10.1016/0168-9002(92)91216-v
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
H. Seggern
中科院分区：
文献类型：
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作者：
H. Seggern
基于光激励X射线存储磷光体的图像板建立了传统使用的二维X射线检测器的有希望的替代方案。这些图像板由一层粉末状X射线存储磷光体组成，通常是碱土金属卤化物BaFBr：Eu 2+，与有机粘合剂混合并安装在聚合物薄膜上。在吸收电离辐射时，有效地产生电子和空穴。这两个物种都被困在他们创造的直接环境中，从而形成了一个潜像。该图像的读出通过光刺激发生，由此被捕获的电子被释放并在Eu 2+光的发射下与被捕获的空穴辐射性地复合。本文介绍了成像系统的原理，然后简要回顾了基础物理学，解释了相关陷阱的性质和光刺激的机制。讨论了成像板探测器的优点和缺点及其物理性质，并提出了可能的改进建议。目前和未来的应用领域。
Image plates based on photostimulable X-ray storage phosphors establish a promissing alternative to conventionally utilized two-dimensional X-ray detectors. These image plates consist of a layer of powdered X-ray storage phosphor, usually the alkaline-earth halide BaFBr:Eu2+, mixed with an organic binder and mounted on a polymeric film. Upon absorption of ionizing radiation, electrons and holes are produced efficiently. Both species are trapped in the immediate surrounding of their creation thereby forming a latent image. The readout of this image occurs by photostimulation whereby the trapped electrons are liberated and recombine radiatively with the trapped holes under emission of Eu2+light. In the present paper the principle of the imaging system is introduced followed by a brief review of the underlying physics explaining the nature of the involved traps and the mechanism of photostimulation. Advantages and disadvantages of image plate detectors and their physical nature are discussed and possible improvements suggested. Present and future fields of application are presented.