Scatter correction in digital mammography based on image deconvolution

Physics in Medicine and Biology
Justin L Ducote, Sabee Molloi

Abstract

X-ray scatter is a major cause of nonlinearity in densitometry measurements using digital mammography. Previous scatter correction techniques have primarily used a single scatter point spread function to estimate x-ray scatter. In this study, a new algorithm to correct x-ray scatter based on image convolution was implemented using a spatially variant scatter point spread function which is energy and thickness dependent. The scatter kernel was characterized in terms of its scattering fraction (SF) and scatter radial extent (k) on uniform Lucite phantoms with thickness of 0.8-8.0 cm. The algorithm operates on a pixel-by-pixel basis by grouping pixels of similar thicknesses into a series of mask images that are individually deconvolved using Fourier image analysis with a distinct kernel for each image. The algorithm was evaluated with three Lucite step phantoms and one anthropomorphic breast phantom using a full-field digital mammography system at energies of 24, 28, 31 and 49 kVp. The true primary signal was measured with a multi-hole collimator. The effect on image quality was also evaluated. For all 16 studies, the average mean percentage error in estimating the true primary signal was found to be -2.13% and the average rms per...Continue Reading

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Citations

May 31, 2011·American Journal of Physiology. Heart and Circulatory Physiology·Zhang ZhangSabee Molloi
Mar 15, 2011·American Journal of Physiology. Heart and Circulatory Physiology·Zhang ZhangSabee Molloi
Sep 21, 2011·Medical Physics·Justin L DucoteS Molloi
Jun 1, 2014·Medical Physics·Stephanie M LeonLouis K Wagner
Sep 18, 2013·IEEE Transactions on Medical Imaging·Seokmin Han, Dong-Goo Kang
Jun 28, 2014·Physics in Medicine and Biology·Alfonso R LamSabee Molloi
Jul 18, 2015·Physics in Medicine and Biology·Changhwan KimSeungryong Cho
Aug 15, 2019·Medical Physics·Oliver DiazDavid R Dance
Jul 23, 2014·Physics in Medicine and Biology·O DiazK Wells
Oct 4, 2016·Physics in Medicine and Biology·F H GreenS Pani
Jul 15, 2015·Journal of Medical Imaging·Han ChenBjörn Cederström
Sep 21, 2018·Medical & Biological Engineering & Computing·K KimJ Oh
Dec 10, 2020·Physics in Medicine and Biology·E MarimónO Díaz
Apr 27, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Guna KimJong-Guk Kim

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