Journal of radiological science and technology (대한방사선기술학회지:방사선기술과학)

Korean Society of Radiological Science (대한방사선과학회)
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Lens Dose Reduction Methods and Image Quality in Orbital Computed Tomography Scan

안와 전산화단층촬영검사 시 수정체 선량감소 방법과 영상 평가

  • Moon, Se-Young (Department of Radiology, National Health Insurance Service Ilsan Hospital) ;
  • Hong, Sang-Woo (Department of Radiology, National Health Insurance Service Ilsan Hospital) ;
  • Seo, Ji-Sook (Department of Radiology, National Health Insurance Service Ilsan Hospital) ;
  • Kim, Yeong-Beom (Department of Radiology, National Health Insurance Service Ilsan Hospital) ;
  • Kwak, Wan-Sin (Department of Radiology, National Health Insurance Service Ilsan Hospital) ;
  • Lee, Seong-Yeong (Department of Radiology, National Health Insurance Service Ilsan Hospital) ;
  • Kim, Jung-Soo (Department of Radiological Technology, Dongnam Health University)
  • 문세영 (국민건강보험 일산병원 영상의학과) ;
  • 홍상우 (국민건강보험 일산병원 영상의학과) ;
  • 서지숙 (국민건강보험 일산병원 영상의학과) ;
  • 김영범 (국민건강보험 일산병원 영상의학과) ;
  • 곽완신 (국민건강보험 일산병원 영상의학과) ;
  • 이성영 (국민건강보험 일산병원 영상의학과) ;
  • 김정수 (동남보건대학교 방사선과)
  • Received : 2020.10.22
  • Accepted : 2020.10.28
  • Published : 2020.10.31
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Abstract

This study analyzed dose reduction and quality of images through dose reduction tools and shielding board to protect sensitive eye lens in radiation during orbit CT examinations for clinical data use. During CT scans of the phantom, surface dose (CT scanner dosimetry phantom, ion chamber-3 times) and quality of image (radiosurgery head phantom, visual assessment-2 times, HU standard deviation) were evaluated using X-care which is dose reduction tools and bismuth shielding board. The results of experiments of eight conditions showed a relatively reduced dose in all other conditions compared to when no conditions were set. In particular, the area corresponding to the ophthalmic part reduced the surface dose by up to 45.7 %. The visual evaluation of images by specialists and the quality evaluation of images analyzed by HU standard deviation were clinically closest to the use of X-care and shielding board (1 cm in height). Therefore, it is believed that the use of shielding board in a suitable location with dose reduction tools while investigating the optimal radiation dose will reduce the exposure dose of sensitive lens at radiation while maintaining the quality of the images with high diagnostic value.

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References

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