X-ray scatter leads to erroneous calculations of dual-energy digital mammography (DEDM). The purpose of this work is
to design an algorithmic method for scatter correction in DEDM without extra exposures or lead sheet. The method was
developed based on the knowledge that scatter radiation in mammograms varies slowly spatially and most pixels in
mammograms are non-calcification pixels, and implemented on a commercial full-field digital mammography system
with a phantom of breast tissue equivalent material. The
pinhole-array interpolation scatter correction method was also
implemented on the system. We compared the background dual-energy (DE) calcification signals in the DE calcification
images. Results show that the background signal in the DE calcification image can be reduced. The rms of background
DE calcification image signal of 1105μm with scatter-uncorrected data was reduced to 187μm and 253μm after scatter
correction, using our algorithmic method and pinhole-array interpolation method, respectively. The range of background
DE calcification signals using scatter-uncorrected data was reduced by ~80% with scatter-corrected data using
algorithmic method. The proposed algorithmic scatter correction method is effective; it has similar or even better
performance than pinhole-array interpolation method in scatter correction for DEDM.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Xi Chen ; Robert M. Nishikawa ; Suk-Tak Chan ; Beverly A. Lau ; Lei Zhang, et al.
"Algorithmic scatter correction in dual-energy digital mammography for calcification imaging", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83130E (February 23, 2012); doi:10.1117/12.911775; http://dx.doi.org/10.1117/12.911775