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兵工学报 ›› 2001, Vol. 22 ›› Issue (3): 323-326.

• 论文 • 上一篇    下一篇

旋转中心偏移对CT重建图像质量的影响

王召巴   

  1. 华北工学院无损检测中心,山西太原,030051
  • 收稿日期:2000-09-01 修回日期:2001-06-01 上线日期:2014-12-25
  • 通讯作者: 王召巴

Effect of Center Deviation on CT Reconstruction Images

Wang Zhaoba   

  1. Research Center for NDT,North China Institute of Technology, Taiyuan,030051
  • Received:2000-09-01 Revised:2001-06-01 Online:2014-12-25
  • Contact: Wang Zhaoba

摘要: 在CT扫描系统中,旋转中心在探测器上投影位置(投影中心)的精确测量非常重要。测量的投影中心与实际的投影中心即使存在较小的误差,都会使重建图像变形并产生伪像。本文分析了旋转中心偏移对重建图像质量的影响,并以计算机模拟和对实际构件CT重建说明了这种影响。

关键词: 计算机断层成像 , 图像重建 , 中心偏移 , 伪像

Abstract: It is very important to accurately measure the position of projection of the center of rota?tion in a CT scanner system. The distortion and artifact will appear in the CT when errors between the actual projection center and the measured projection center exist. The paper analyzes the effect of rotation center deviation on reconstructed images and illustrates the phenomenon by computer simula?tion and experiment.

Key words: computer tomography (CT) , image reconstruction , center deviation , artifact

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