Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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A Study on the Usefulness of Copper Filters Made with 3D Printers in Longbone Examination Using Long Length Detector

장골 검출기를 이용한 장골 검사에서 3D 프린터로 제작한 구리 필터의 유용성 연구

  • Kim, Woo-Young (Department of Radiological Science, College of Health Science, Gachon University) ;
  • Seo, Hyun-Soo (Department of Radiological Science, College of Health Science, Gachon University) ;
  • Han, Bong-Ju (Department of Medical image, Vieworks) ;
  • Yoon, Myeong-Seong (Department of Emergency Medicine, College of Medicine, Hanyang University) ;
  • Lee, Young-Jin (Department of Radiological Science, College of Health Science, Gachon University)
  • 김우영 (가천대학교 방사선학과) ;
  • 서현수 (가천대학교 방사선학과) ;
  • 한봉주 (Vieworks 의료영상사업부) ;
  • 윤명성 (한양대학교 의과대학 응급의학교실) ;
  • 이영진 (가천대학교 방사선학과)
  • Received : 2021.11.09
  • Accepted : 2021.12.17
  • Published : 2021.12.31
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Abstract

Long-bone examination is mainly used for inspection of the lower extremities. Recently, a long length detector (FXRD-1751S, VIEWORKS, Korea) with three digital detectors attached has been developed. High energy X-rays are used because pelvic areas require high image quality. In this case, X-rays are transmitted a lot in thin areas such as an ankle, and it is not suitable for diagnosing an image. Therefore, this study use copper filters made with 3D printers to increase image quality in the Long-bone inspection. A copper filter was manufactured in consideration of the overall thickness of the lower part. The experiment was conducted in anterior-posterior (AP) and lateral (LAT) positions, depending on the presence or absence of the filter. 5x5 pixels of region of interest (ROI) were selected from the pelvis, knee, and ankle areas. X-rays were irradiated under the conditions of 70 kVp and 40 mAs for AP, 80 kVp, and 63 mAs for lat when without filters, 90 kVp and 80 mAs for AP, 90 kVp and 100 mAs for lat when with filters. signal to noise ratio(SNR) ratio and contrast to noise (CNR) values were measured 1106.38, 14.34 before applying the filter and 1189.32, 70.43 after the filter. For the knee area, 650.44, 97.61 before applying the filter, and 1013.17, 444.24 after applying the filter. For the ankle area, 206.65, 23.68 before applying the filter and 993.50, 136.11 after applying the filter. In the Long-bone examination, SNR and CNR were greatly measured when the filter was applied, confirmed the availability of using the copper additional filter.

Keywords

References

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