对计算机断层扫描技术中几个问题的探讨

Study on Some Problems of Computer Tomography

本文对计算机断层扫描技术中所选择滤波函数的不同、射线束宽度的差异、探测器的响应、数据的采样及旋转中心的偏移等因素影响图像重建质量分别进行了讨论和分析。实验结果表明，这几个因素对重建后的图像质量产生的影响都是不可忽视的，尤其是在某些情况下，将会导致产生较大的误差。

In order to improve the accuracy of reconstruction, the effects of beam′s width, detector response, sampling and centre deviation on computer tomography are discussed. The experimental results show that these factors effect the accuracy of reconstruction, and may bring about great error in some conditions. (