Multi-Material Decomposition using Low-Current X-Ray and a Photon-Counting CZT Detector.
Multi-Material Decomposition using Low-Current X-Ray and a Photon-Counting CZT Detector.
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DOI：
10.1109/nssmic.2011.6154705
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Seo Y
中科院分区：
文献类型：
--
作者：
Kim S;Hernandez A;Alhassen F;Pivovaroff M;Cho HM;Gould RG;Seo Y
我们开发和评估了一个X射线光子计数成像系统，使用能量分辨碲锌镉（CZT）探测器加上专用集成电路（ASIC）读出。这种X射线成像系统可用于识别物体内部的不同材料。CZT探测器具有较大的有效面积（5×5阵列，由25个CZT模块组成，每个模块具有16×16个像素，总面积为200 mm × 200 mm），对X射线光子的阻挡效率较高（在60 keV和5 mm厚度下约为100%）。我们通过在目标材料银和铟的吸收边缘周围应用不同的能量窗口来探索该系统的性能，以区分一种材料与另一种材料。基于光子计数CZT的X射线成像系统能够区分材料，证明其作为辐射光谱分解系统的能力。
We developed and evaluated an x-ray photon-counting imaging system using an energy-resolving cadmium zinc telluride (CZT) detector coupled with application specific integrated circuit (ASIC) readouts. This x-ray imaging system can be used to identify different materials inside the object. The CZT detector has a large active area (5×5 array of 25 CZT modules, each with 16×16 pixels, cover a total area of 200 mm × 200 mm), high stopping efficiency for x-ray photons (~ 100 % at 60 keV and 5 mm thickness). We explored the performance of this system by applying different energy windows around the absorption edges of target materials, silver and indium, in order to distinguish one material from another. The photon-counting CZT-based x-ray imaging system was able to distinguish between the materials, demonstrating its capability as a radiation-spectroscopic decomposition system.