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Home > Issues > RetrieveFeasibility Study of Block-Matching and 3D Filtering Algorithm in Low-Dose CT Image with Tin Filter
Journal of Magnetics, Volume 28, Number 1, 31 Mar 2023, Pages 56-63
Mingyu Song (Gachon University), Minsu Kim (Gachon University), Junsoo Lim (Gachon University), Donghwan Chun (Gachon University), Minji Park (Gachon University), Jina Shim * 
(Severance Hospital), Youngjin Lee * (Gachon University)
(Severance Hospital), Youngjin Lee * (Gachon University)
Abstract
The purpose of this study was to confirm the utility of block-matching and 3D filtering (BM3D) algorithm in
computed tomography (CT) images using a tin filter with a high pitch. We acquired phantom images and measured
the coefficient of variation (COV) and contrast-to-noise ratio (CNR) for quantitative evaluation. The
optimized results were obtained when the sigma value of the BM3D algorithm was nine. In addition, when the
sigma value of the optimized BM3D algorithm was applied, superior results were obtained compared with conventional
filtering methods. In particular, we confirmed that the COV and CNR of the images obtained using
the BM3D algorithm improved 6.52 and 5.49 times, respectively. In conclusion, the utility of the optimized
BM3D algorithm has been demonstrated in low-dose CT images using a tin filter.
computed tomography (CT) images using a tin filter with a high pitch. We acquired phantom images and measured
the coefficient of variation (COV) and contrast-to-noise ratio (CNR) for quantitative evaluation. The
optimized results were obtained when the sigma value of the BM3D algorithm was nine. In addition, when the
sigma value of the optimized BM3D algorithm was applied, superior results were obtained compared with conventional
filtering methods. In particular, we confirmed that the COV and CNR of the images obtained using
the BM3D algorithm improved 6.52 and 5.49 times, respectively. In conclusion, the utility of the optimized
BM3D algorithm has been demonstrated in low-dose CT images using a tin filter.
Keywords: radio-magnetic imaging; low-dose CT; Tin filter; radio-magnetic image processing; block-matching and 3D filtering (BM3D); optimization of denoising algorithm
DOI: https://doi.org/10.4283/JMAG.2023.28.1.056
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