北京航空航天大学学报 ›› 2004, Vol. 30 ›› Issue (08): 698-701.

• 论文 • 上一篇    下一篇

X射线平板探测器数字成像及其图像校准

周正干, 滕升华, 江巍, 安振刚   

  1. 北京航空航天大学 机械工程及自动化学院, 北京 100083
  • 收稿日期:2003-04-18 出版日期:2004-08-31 发布日期:2010-09-21
  • 作者简介:周正干(1967-),男,湖南湘潭人,教授, zzhenggan@buaa.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(50275008)

X-ray flat-panel-detector-based digital radiography and its image calibration

Zhou Zhenggan, Teng Shenghua, Jiang Wei, An Zhengang   

  1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2003-04-18 Online:2004-08-31 Published:2010-09-21

摘要: 为了提高X射线数字成像系统的图像质量,以基于平板探测器的X射线数字照相系统为研究对象,介绍了平板探测器自身影响图像质量的4大因素:随机噪声,偏置误差,像元响应不一致性和瑕疵像元等,分析了这些因素的成因及其对图像质量的影响,提出了相应的减小和消除这些影响的图像校准方法.实验结果表明:运用这些图像校准方法,可以有效地去除上述因素对图像质量的影响,显著提高平板探测器输出图像的质量,为后续图像判读奠定了良好的基础.

Abstract: To improve imaging quality of X-ray digital radiography system, an X-ray flat-panel-detector-based digital radiography system was investigated. Four factors of flat panel detector which degrade image quality, such as random noise, offset, response nonuniformity and defective pixels, were introduced. How they occur and influence imaging quality was analyzed. Corresponding methods for image calibration were put forward to minish and eliminate the influences on image quality. Experimental results indicate that, with the image calibration methods, the influences of above mentioned factors can be removed effectively and the quality of image from flat panel detector can be improved greatly, which has founded a good foundation for succedent image identifying.

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