中文摘要：

工业CT教学实验仪被应用于物理和放射医学专业的教学，图像重建是教学实验仪软件的重要组成部分。论文阐述了CT的物理原理和第一代CT重建算法，描述了工业CT教学实验仪的扫描过程；分析了旋转中心偏移的伪影，实现了中心偏移校正方法，设计了图像重建软件，实际应用表明此软件重建图像清晰质量较高。

英文摘要：

Industrial CT instrument for teaching is applied to teaching and study in field of physics and radiology major, image reconstruction is an important part of software on CT instrument. The paper expatiate on CT physical theory and first generation CT reconstruction algorithm, describe scan process of in- dustrial CT instrument for teaching analyze image artifact as result of displacement of rotation center, implement method of center displacement correcting, design and complete image reconstruction software , application shows that recontructed image is very clear and qualitatively high.