Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Evaluation for the Usefulness of Copper Filters according to Mode Change in Digital Radiography System

DR 시스템에서 모드 변화에 따른 구리필터의 유용성 평가

  • Kim, Jae-Kyeom (Department of Nuclear Medicine, The Catholic University of Korea, Incheon St. Mary's Hospital) ;
  • Kim, Jeong-Koo (Department of Radiological Science, Hanseo University)
  • 김재겸 (가톨릭대학교 인천성모병원 핵의학팀) ;
  • 김정구 (한서대학교 방사선학과)
  • Received : 2017.01.12
  • Accepted : 2021.02.21
  • Published : 2021.02.28
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Abstract

This study confirmed the usefulness of the copper filter according to the mode change by comparing and analyzing the energy change according to the application of the copper filter and the change in effective dose and image quality according to the distance to the subject in the DR(Digital Radiography) system. The average energy increased when the copper filter was applied and the reduction rate by 50% of mAs was increased as the thickness of the copper filter increased according to the application of the 10 kVp rule in AEC mode. The effective dose decreased as the thickness increased when the copper filter was applied in AEC(Automatic Exposure Control) mode and manual mode according to the application of the 10 kVp rule, and the decrease rate decreased with increasing 10 kVp increments. As a result of analyzing the dicom images for AEC mode and manual mode with Image J. the PSNR(Peak Signal to Noise Ratio) values were approximate values of less than 30 dB for each mode and for each copper filter thickness. When the copper filter was applied, the average energy increased, so when the 10 kVp rule was applied, the mAs for each mode could be reduced, and the effective dose could also be reduced. However, as the distance and tube voltage increased, the reduction rate of mAs decreased, and the quality of the image was found to decrease when the copper filter was applied, but there was no difference in quality of the image when the copper filter thickness increased.

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References

  1. KFDA. Measurement guideline of patient dose. Seoul, Korea; 2007.
  2. Kim JM, Do GH, Kim GP, Hwang JY, Choi HJ, Kim SG. A Study on building the management system and methods of patient radiation exposure dose. National Evidence-based Healthcare Collaborating Agency; 2014.
  3. Shin SG. Reducing Methods of Patient's Exposed Dose Using Auto Exposure Control System in Digital Radiography. Journal of Radiological Science and Technology. 2013;36(2):111-122.
  4. Shin SI, Kim CY, Kim SC. The Study on the Reduction of Patient Surface Dose Through the use of Copper Filter in a Digital Chest. Journal of Radiological Science and Technology. 2008;31(3):223-228.
  5. Yoo MJ, Kim YJ, Choi SW, Choi JI. A Study on the Relationship between Service Quality of Radiation Dose Management and Customer Satisfaction. Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology. 2018;8(5):513-521.
  6. Cho WI, Kim YK, Lee GD. Change of Dose Exposure and Improvement of Image Quality by Additional Filtration in Mammography. Journal of Radiation Protection and Research. 2013;38(2):78-90. https://doi.org/10.14407/jrp.2013.38.2.078
  7. Kim SH. A Convergence Study on Evaluation of Usefulness of Copper Additional Filter in the Digital Radiography System. Journal of Digital Convergence. 2015;13(9):351-359. https://doi.org/10.14400/JDC.2015.13.9.351
  8. Shin SG. Decreased of Patient Dose by Built-in Filter in Pelvis A-P Projection. Journal of the Korea Contents Association. 2012;12(8):233-239. https://doi.org/10.5392/JKCA.2012.12.08.233
  9. Bok GS, Kim SH. Effect of Patient Size on Image Quality and Dose Reduction after Added Filtration in Digital Chest Tomosynthesis. Journal of the Korean Society of Radiology. 2018;12(1):23-30. https://doi.org/10.7742/jksr.2018.12.1.23
  10. Kim JJ, Jang SW, Park JH, Lee KS, Ha DY. Evaluation of Organ and Effective Dose using A PC-Based Monte Carlo Program in AEC Mode and Fix Mode for the whole spine antero-posterior radiography. Korean Journal of Digital Imaging in Medicine. 2012;14(2):23-31.
  11. Claudia R, Joao G, Corrie K, Ana R, Chloe B, Ryan HC, et al. Image quality and dose analysis for a PA chest X-ray: Comparison between AEC mode acquisition and manual mode using the 10 kVp 'rule'. Radiography. 2014;20(4):339-345. https://doi.org/10.1016/j.radi.2014.06.001
  12. Luis L, Loris F, Abdulfatah A, Marloes H, Chloe M, Sadeeda N, et al. 10 kVp rule-an anthropomorphic pelvis phantom imaging study using a CR system: Impact on image quality and effective dose using AEC and manual mode. Radiography. 2014;20(3):333-338. https://doi.org/10.1016/j.radi.2014.04.007
  13. Kim KT, Hna MJ, Heo YJ, Kim JH, Kang SS, Park JK, et al. A Study on the Development of High-sensitivity AEC-sensor for Minimization of Dose Creep in Diagnostic Imaging System. Journal of the Korean Society of Radiology. 2016;10(5):321-325. https://doi.org/10.7742/jksr.2016.10.5.321
  14. Lee KJ, Kim MG, Lee JW, Kim HC. Research for The Environmental Optimization of Dose and Image quality in Digital Radiography. Journal of the Institute of Electronics and Information Engineers. 2013;50(2):203-209. https://doi.org/10.5573/IEEK.2013.50.2.203
  15. Shepard S, Wang J, Flynn M, Gingold E, Goldman L, Krugh K, et al. An exposure indicator for digital radiography: AAPM Task Group 116(Executive Summary). Medical Physics. 2009;36(7):2898-2914. https://doi.org/10.1118/1.3121505