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• W3205341132 abstract "Background Dual-energy X-ray images (DEI) can distinguish or improve materials of interest in a two-dimensional radiographic image, by combining two images obtained from separate low and high energies. The concepts of DEI performance describing the performance of double-exposure DEI systems in the Fourier domain been previously introduced, however, the performance of double-exposure DEI itself in terms of various parameters, has not been reported. Materials and Methods To investigate the DEI performance, signal-difference-to-noise ratio, modulation transfer function, noise power spectrum, and noise equivalent quanta were used. Low- and high-energy were 60 and 130 kVp with 0.01–0.09 mGy, respectively. The energy-separation filter material and its thicknesses were tin (Sn) and 0.0–1.0 mm, respectively. Noise-reduction (NR) filtering used the Gaussian-filter NR, median-filter NR, and anti-correlated NR. Results and Discussion DEI performance was affected by Sn-filter thickness, weighting factor, and dose allocation. All NR filtering successfully reduced noise, when compared with the dual-energy (DE) images without any NR filtering. Conclusion The results indicated the significance of investigating, and evaluating suitable DEI performance, for DE images in chest radiography applications. Additionally, all the NR filtering methods were effective at reducing noise in the resultant DE images. Keywords: Dual-Energy X-Ray Imaging, Modulation Transfer Function, Noise Power Spectrum, NEQ, Noise Reduction" @default.
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• W3205341132 date "2021-10-15" @default.
• W3205341132 modified "2023-09-25" @default.
• W3205341132 title "Study on Dual-Energy Signal and Noise of Double-Exposure X-Ray Imaging for High Conspicuity" @default.
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• W3205341132 doi "https://doi.org/10.14407/jrpr.2021.00017" @default.
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