Elimination of gridlines by using non linear filter in mammograhic image

Toshinori Maruyama, Hideki Yamamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The mammographic X-ray equipment uses a radiographic grid in order to remove the scatter radiation and improve image contrast. The grid causes striped linesto appear on the film and may degrade diagnostic information. In this study, we propose a new method which reduces the noise caused by the grid on mammographic film using non linear image filtering. We performed median filtering and the V-filtering as a method of image filtering. We consider the region of the filters to eliminate gridlines effectively. In the experiment using the breast phantom, we calculated signal to noise (SN) ratios in the micro calcifications region. The SN ratio of the image processed by median filtering after the Vfiltering was increased. Furthermore, we evaluated the noise by using the power spectrum in a line profile by fast Fourier transform. The value of the power spectrum at a frequency that represented the periodic noise made by the gridlines was decreased. We could confirm the validity of image filtering. It was found out that our proposed image filtering method was useful for eliminating gridlines in the X-ray image.

Original languageEnglish
Title of host publication2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009 - Proceedings
Pages52-57
Number of pages6
DOIs
Publication statusPublished - Oct 16 2009
Event2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009 - Hong Kong, China
Duration: May 11 2009May 12 2009

Publication series

Name2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009 - Proceedings

Other

Other2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009
CountryChina
CityHong Kong
Period5/11/095/12/09

Keywords

  • Gridlines
  • Image processing
  • Mammography
  • Micro calcifications
  • Radiographic grid

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering

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  • Cite this

    Maruyama, T., & Yamamoto, H. (2009). Elimination of gridlines by using non linear filter in mammograhic image. In 2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009 - Proceedings (pp. 52-57). [5071601] (2009 IEEE International Workshop on Imaging Systems and Techniques, IST 2009 - Proceedings). https://doi.org/10.1109/IST.2009.5071601