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中文摘要：
一种用于大学物理教学的广角扇束扫描γ射线工业CT实验仪已研制完成。通过实验可使学生了解和掌握CT基本理论、CT扫描数据采集过程、图像重建等知识。该仪器系统包括一个活度为7．4×10^8 Bq的^137Cs同位素放射源、五通道塑料闪烁体＋光电倍增管”探测系统、一台计算机和一套图像重建处理软件。机械运动控制、数据采集软件用Visual C＋＋开发，CT图像重建可使用系统提供的软件也可以由学生使用MATLAB编程。
英文摘要：
A γ-ray computed tomography （CT） demonstrator based on fan-beam projection has been designed and built for education purpose, in which the principles of CT, its data acquisition and image reconstruction is presented. The system consists of a ^137Cs source of 7.4×10^8 Bq, five-channel detectors using plastic scintillator and photo multiplier tube （PMT）, a standard PC and an image processing and reconstruction software. The mechanics of the system is controlled and data is acquired by programs written in Visual C＋＋. CT images are reconstructed using the presented software or MATLAB programs.
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The construction of 2D rotationally invariant wavelets and their application in image edge detection
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