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http://dx.doi.org/10.7742/jksr.2020.14.6.763

A Study on the Usefulness of VGR (Virtual Grid Role) Algorithm for Elevation of Image Quality in DR System  

Yang, Hyun-Jin (Department of Radiology, Namcheon Medical Center)
Han, Dong-Kyoon (Department of Radiological Science, Eulji University)
Publication Information
Journal of the Korean Society of Radiology / v.14, no.6, 2020 , pp. 763-772 More about this Journal
Abstract
During X-ray examinations in the DR system, the scattered X-rays physically generated by the patient cause image blurring in poor quality. Although X-rays to increase the contrast of images, this increases the patient's exposure dose and is likely to result in grid induced artifacts. Therefore, the purpose of this study is obtain images similar to those of real-grid with non-grid level conditions using a VGR (Virtual Grid Role) algorithm that serves as a virtual grid. Comparing MTF, SNR and CNR of non-grid and VGR algorithm images obtained with 70% exposure conditions of real-grid images showed that the MTF0.5 differed from 0.265 to 0.350 and the MTF0.1 from 0.412 to 0.467 and the SNR, CNR were also different. In addition, comparing MTF, SNR and CNR of VGR algorithm and real-grid images showed that the MTF0.5 differed from 0.350 to 0.367 and the MTF0.1 from 0.467 to 0.483 and the SNR, CNR by little.
Keywords
Virtual grid role algorithm; Grid; Image quality; Improvement;
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1 D. M. Kwon, Analog and digital PACS, daehakseorim, pp 19-22, 2016.
2 J. K. Park, J. H. Jun, S. W Yang, K. T. Kim, I. H. Choi, S. S. Kang, "A study for effects of image quality due to scatter ray produced by increaseing of tube voltage", Journal of the Korean Society Radiology, Vol. 11, No. 7, pp. 663-669, 2017. https://doi.org/10.7742/jksr.2017.11.7.663   DOI
3 S. H. Choi, "A study on dose image quality in DR system evaluation according to use of the grid", A master's thesis, Hanseo university, 2012.
4 P. K. Cho "Distribution of the scatter ray on chest X-ray examinations", The Journal of the Korea contents association, Vol. 12, No. 7, pp. 255-260, 2012. http://dx.doi.org/10.5392/JKCA.2012.12.07.255   DOI
5 M. C. Jeon, "The attenuation of primary, secondary dose and scattering dose distribution (Thesis)", Chungnam university, 2012.
6 K. J. Lee, M. G. Kim, J. W. Lee, H. C. Kim, "Research for the environmental optimization of dose and image quality in digital radiography", Journal of the institute of electronics engineers of korea, Vol. 50, No. 2, pp. 203-209, 2013. http://dx.doi.org/10.5573/ieek.2013.50.2.203   DOI
7 J. K. Park, S. S. Kang, S. W Yang, Y. J. Heo, K. T. Kim, "The study on scattered radiation effects according to acquisition of X-ray imaging Monte Carlo simulation", Journal of the Korean Society of Radiology, Vol. 12, No. 5, pp. 549-556, 2018. http://dx.doi.org/10.7742/jksr.2018.12.5.549   DOI
8 S. H. Park, "Change of the scattered dose by field size on chest X-ray examinations (Thesis)", Korea university. 2017.
9 W. S. Kang, "The reduction method of X-ray scatter from digital radiography image by image processing (Thesis)". Yonsei university. 2012.
10 M. C. Kim, "A study on the perception of grid and optimum grid radio of digital radiation generators (Thesis)". Hanseo university. 2019.
11 J. W. Lee, S. W. Lee, J. S. Lee, T. Y. Kim, B. E. Kim, S. H Kim, J. H. Nam, "Usefulness of digital wireless detector image processing algorithm (Sim-Grid)", Journal of the Korean radiological technologists, Vol. 4, No. 1, pp. 84-91, 2018.
12 H. G. Kim, J. E. Jeong, J. H. Lee, J. H. Park, J. S. Seo, H. J. Kim, "A dynamically segmented DCT technique for grid artifact suppression in X-ray images", Proceedings of the Korea Information Processing Society Conference, Vol. 8, No. 4, pp. 171-178, 2019. https://doi.org/10.3745/KTSDE.2019.8.4.171   DOI
13 C. H. Baek, "A study of scattered radiation effect on digital radiography imaging system", Journal of radiological science and technology, Vol. 40, No. 1, pp. 71-78, 2017. http://dx.doi.org/10.17946/JRST.2017.40.1.11   DOI
14 S. H. Jeong, B. H. Han, H. R. Jeong, "Evaluation of image quality when using grid during child chest X-ray examination", Journal of radiological science and technology, Vol. 40, No. 3, pp. 371-376, 2017. http://dx.doi.org/10.17946/JRST.2017.40.3.03   DOI
15 H. I. Lee, "A study on removal of scattering ray and reduction of exposure dose by using metal sheet", master's thesis, Kunyang university, 2017.
16 W. T. Lim, "Quantitative of ACR phantom using the modulation transfer function in magnetic resonance imaging", A doctoral dissertation, Hanseo university, 2017.
17 S. Y Ahn, K. J. Chae, J. M. Goo, "The potential role of grid-like software in bedside chest radiography in improving image quality and dose reduction : An observer preference study", Korean journal of radiology, Vol. 19, No. 3, pp. 526-533, 2018. http://dx.doi.org/10.3348/kjr.2018.19.3.526   DOI
18 J. K. Lee, Principle of radiation protection, Korean association for radiation application, Vol. 1, pp. 1-3, 2016.
19 S. G. Choi, "Change of the scattered dose by field size in X-Ray radiography", International Journal of Contents, Vol. 13, No. 3, pp. 198-203. 2013. http://dx.doi.org/10.5392/JKCA.2013.13.03.198   DOI
20 B. J. An, "A comparative study for resolution and density of chest imaging using film/screen, CR and DR", Journal of the Korean Society Radiology, Vol. 4, No. 1, pp. 25-30, 2010. https://doi.org/10.7742/jksr.2010.4.1.025   DOI
21 Stewart Carlyle Bushong, Radiologic science for technologists : physics, biology, and protection, Elesvier, pp 8-15
22 J. K. Park, S. W Yang, J. H. Jun, S. Y. Cho, K. T. Kim, Y. J. Heo, S. S. Kang, "The effects of image quality due to X-ray according to increasing patient thickness", Journal of the Korean Society Radiology, Vol. 11, No. 7, pp. 671-677, 2017. http://dx.doi.org/10.7742/jksr.2017.11.7.671   DOI
23 H. Y. You, Introduction to radiology, hyunmun, pp 25-28, 2011.
24 K. S. Sin, Radiation physics, shinkwang, pp 108, 2018.