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http://dx.doi.org/10.7742/jksr.2022.16.5.553

A Simulation Study on Image Quality of Virtual Monochromatic Image using Dual-energy Method  

Son, Ki-Hong (Electronics and Telecommunications Research Institute)
Lee, Soo-Yeul (Electronics and Telecommunications Research Institute)
Kim, Dae-Hong (Department of Radiological Science, Eulji University)
Chung, Myung-Ae (Department of Bigdata Medical Convergence Science, Eulji University)
Publication Information
Journal of the Korean Society of Radiology / v.16, no.5, 2022 , pp. 553-558 More about this Journal
Abstract
The purpose of this work was a simulation study to evaluate the virtual monochromatic (VM) image quality of blood vessels compared to the monochromatic image. Dual-energy images were obtained based on the linear attenuation coefficients of five materials at 50 keV and 80 keV at low- and high-energies, respectively. A weighting factor is required to synthesize the VM image, and the liver and bone were used as basis materials to obtain the weighting factor. VM images were synthesized at energies ranging from 30 keV to 100 keV. Image quality was evaluated by Contrast to noise ratio (CNR) and noise by setting calcium and contrast medium as signals and blood as background. According to the results, the energies with the maximum CNR were 50 keV and 60 keV for calcium and contrast medium, respectively. The energies showing the minimum noise were 70 keV, 70 keV, and 60 keV in calcium, iodine contrast medium, and blood, respectively. The VM image can contribute to the improvement of diagnostic performance in CT examination because it can implement an image at the optimal energy that minimize noise and maximize CNR.
Keywords
Dual-energy; Virtual monochromatic image; Simulation; Vessel;
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