Multi-Material Decomposition using Low-Current X-Ray and a Photon-Counting CZT Detector.

IEEE Nuclear Science Symposium conference record. Nuclear Science Symposium Pub Date : 2011-01-01 DOI:10.1109/nssmic.2011.6154705

Sangtaek Kim, Andrew Hernandez, Fares Alhassen, Michael Pivovaroff, Hyo-Min Cho, Robert G Gould, Youngho Seo

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Abstract

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.

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利用低电流x射线和光子计数CZT探测器进行多材料分解。

我们开发并评估了一种x射线光子计数成像系统，该系统使用能量分辨碲化镉锌(CZT)探测器与专用集成电路(ASIC)读数相结合。这种x射线成像系统可用于识别物体内部的不同材料。该CZT探测器具有较大的有效面积(5×5由25个CZT模块组成的阵列，每个模块有16×16个像素，覆盖总面积为200mm × 200mm)，对x射线光子的拦截效率高(在60kev和5mm厚度下达到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来探索该系统的性能，以区分不同的材料。基于光子计数cts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。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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IEEE Nuclear Science Symposium conference record. Nuclear Science Symposium

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