Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/40772
Title: Scatter correction algorithm without extra exposure for dual-energy digital mammography
Authors: Chen, XI
Mou, X
Yan, H
Yu, H
Zhang, L 
Keywords: Digital mammography
Mammography
Radiation
X-rays
Issue Date: 2009
Publisher: SPIE-International Society for Optical Engineering
Source: Proceedings of SPIE : the International Society for Optical Engineering, 2009, v. 7258, 725840 How to cite?
Journal: Proceedings of SPIE : the International Society for Optical Engineering 
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.
Description: Medical Imaging 2009 : Physics of Medical Imaging, San Diego, CA, 7-12 Feb 2009
URI: http://hdl.handle.net/10397/40772
ISSN: 0277-786X
EISSN: 1996-756X
DOI: 10.1117/12.813466
Appears in Collections:Conference Paper

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