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Proceedings Article

Scatter correction algorithm without extra exposure for dual-energy digital mammography

[+] Author Affiliations
Xi Chen, Xuanqin Mou, Hao Yan

Xi'an Jiaotong Univ. (China)

Hengyong Yu

Virginia Polytechnic Institute and State Univ. (USA)

Lei Zhang

The Hong Kong Polytechnic Univ. (Hong Kong, China)

Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725840 (March 14, 2009); doi:10.1117/12.813466
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From Conference Volume 7258

  • Medical Imaging 2009: Physics of Medical Imaging
  • Ehsan Samei; Jiang Hsieh
  • Lake Buena Vista, FL | February 07, 2009

abstract

X-ray scatter leads to erroneous calculations of dual-energy digital mammography (DEDM). The existing methods for scatter correction in DEDM are using anti-scatter grids or the pinhole-array interpolation method which is complicated and impractical. In this paper, a scatter correction algorithm for DEDM is developed based on the knowledge that scatter radiation in mammograms varies slowly and most pixels in mammograms are non-microcalcification pixels. The proposed algorithm only uses the information of low-energy (LE) and high-energy (HE) images. And it doesn't need anti-scatter grids, lead sheet and extra exposures. Our results show that the proposed scatter correction algorithm is effective. When using the simple least-squares fit and linear interpolation, the scatter to primary ratio (SPR) can be decreased from ~33.4% to ~2.8% for LE image and from ~26.2% to ~0.8% for HE image. Applying scatter correction to LE and HE images, the resultant background signal in the DE (dual-energy) calcification image can be reduced significantly.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Xi Chen ; Xuanqin Mou ; Hao Yan ; Hengyong Yu and Lei Zhang
"Scatter correction algorithm without extra exposure for dual-energy digital mammography", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725840 (March 14, 2009); doi:10.1117/12.813466; http://dx.doi.org/10.1117/12.813466


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