부비동 디지털 엑스선검사에서 자동노출제어 조절인자의 최적화를 통한 조사선량 감소 효과
Effects of Exposure Dose Reduction by Optimization of Automatic Exposure Control Factors in Digital Radiographic Examination of Paranasal Sinus
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
The purpose of this study was to reduce dose while maintaining image quality during digital radiographic examination of paranasal sinus by using the automatic exposure control (AEC) system. The tube voltage was set as six stages that increased by about 10 kVp to 70 kVp, 81 kVp, 90 kVp, 102 kVp, 109 kVp and 117 kVp. And then the AEC system conditions were consisted of 9 setting environments, that change mode of the sensitivity (S200, S400, S800) and the density (+2.5, 0, -2.5). We measured automatically exposed tube current (mAs) under 54 conditions with combined these, and assessed SNR and PSNR through the acquired images. In addition, four radiologists performed a qualitative assessment of the acquired images for each combination on a five-point scale of the Likert. As a result, the lowest dose and the highest values of SNR and PSNR in images with a qualitative assessment more than 4 point were the AEC control factors of 90 kVp, S800, D2.5. We applied this condition to the clinical trial, it showed an effect of 83.1% reduction in exposure radiation dose (mR). Therefore, AEC system could be used as dose reduction technology if it understood and used related regulatory factors and physical characteristics.
Abstract
The purpose of this study was to reduce dose while maintaining image quality during digital radiographic examination of paranasal sinus by using the automatic exposure control (AEC) system. The tube voltage was set as six stages that increased by about 10 kVp to 70 kVp, 81 kVp, 90 kVp, 102 kVp, 109 kVp and 117 kVp. And then the AEC system conditions were consisted of 9 setting environments, that change mode of the sensitivity (S200, S400, S800) and the density (+2.5, 0, -2.5). We measured automatically exposed tube current (mAs) under 54 conditions with combined these, and assessed SNR and PSNR through the acquired images. In addition, four radiologists performed a qualitative assessment of the acquired images for each combination on a five-point scale of the Likert. As a result, the lowest dose and the highest values of SNR and PSNR in images with a qualitative assessment more than 4 point were the AEC control factors of 90 kVp, S800, D2.5. We applied this condition to the clinical trial, it showed an effect of 83.1% reduction in exposure radiation dose (mR). Therefore, AEC system could be used as dose reduction technology if it understood and used related regulatory factors and physical characteristics.
참고문헌 (20)
- Chiu P, "The diagnostic value of sinus radiography in the evaluation of sinusitis", Journal of Chin J Radiology, 35(2), pp.143~148 (2010)
- 이진수, "디지털 흉부영상에서 자동노출제어 및 감도변화를 이용한 영상품질의 정량적인 평가", 한국콘텐츠학회 논문지, 13(8), pp.275~283 (2013), 한국콘텐츠학회[DOI]
- Hamer OW, "Chest radiography with a flat-panel detector : Image quality with dose reduction after copper filtration", radiology, 237(2), pp.691~700 (2005)
- ICRP, "Statement on Tissue Reactions. Approved by the Commission on April", ~ (2007)
- 홍선숙, "Digital Radiography System에서 X선 광자 검출 방식에 따른 선량 및 화질 특성에 관한 연구", 전자공학회논문지, 50(12), pp.247~253 (2013), 대한전자공학회
- 황준호, "DR(Digital Radiography)에서 자동노출제어장치의 감도변화에 따른 검출기 성능평가 시 흡수선량과 히스토그램을 통한정량적 분석방법에 관한 연구", 한국콘텐츠학회 논문지, 18(1), pp.232~240 (2018), 한국콘텐츠학회[DOI]
- Seibert JA, "Digital radiography : Image quality and radiation dose", Health Physics, 95(5), pp.586~598 (2008)
- Schaefer-Prokop C, "Digital chest radiography : An update on modern technology, dose containment and control of image quality", European Radiology, 18(9), pp.1818~1830 (2008)
- 이진수, "디지털 흉부 측와위 후전방향 검사 시 Ion chamber조합 설정과 관전압 변화에 따른 장기선량 및 화질 평가", 한국콘텐츠학회 논문지, 15(1), pp.316~323 (2015), 한국콘텐츠학회[DOI]
- Hawking N, "Effects of AEC chamber selection on patient dose and image quality", Radiologic Technoloy, 80(5), pp.411~420 (2009)
- Kim SC, "Evaluation of automatic exposure control system chamber for The dose optimization when examining pelvic in digital radiography", Journal of X-ray Science and Technology, 23(3), pp.321~330 (2015)
- 이진수, "디지털 흉부엑스선 검사에서 환자선량 감소를 위한 부가필터와 Ion chamber 센서 조합", 한국방사선학회논문지, 9(3), pp.175~181 (2015), 한국방사선학회[DOI]
- 김정수, "진단용엑스선촬영장치의 간접 선량 계산법 개발", 방사선기술과학, 41(6), pp.587~594 (2018), 대한방사선과학회[DOI]
- Jeong MG, "Effects of field configuration shielding area and changing of density and sensitivity on tube current and image quality in automatic exposure control system", Journal of Radiological Science and Technology, 14(5), pp.635~642 (2020)
- 정지상, "자동노출제어를 사용한 X선 흉부촬영에서 AEC 표지자 사용에 따른 환자 피폭선량 감소 효과", 방사선기술과학, 37(3), pp.177~185 (2014), 대한방사선과학회
- 황준호, "DR(Digital Radiography)에서 관전압 및 자동노출제어장치의 감도 변화에 따른 검출기의 동적 범위 성능평가 방법연구 -Dynamic Step Wedge와 히스토그램 평가를 중심으로", 한국콘텐츠학회 논문지, 19(4), pp.368~380 (2019), 한국콘텐츠학회[DOI]
- 임세훈, "미세 대조도 영상을 기반한 디지털 방사선 영상 시스템의 자동노출제어 조절인자 간의 상관관계 분석", 방사선기술과학, 44(1), pp.1~8 (2021), 대한방사선과학회
- 이광재, "디지털 방사선촬영 환경에서 선량의 최적화 및 영상품질에 대한 연구", 전자공학회논문지, 50(2), pp.203~209 (2013), 대한전자공학회
- Huang W, "Configuration of AEC kVp dependence for digital radiography systems", Progress in Biomedical Optics and Imaging Proceedings Series, 6510(1), pp.651017~ (2007)
- Bowden L, "Doses under Automatic Exposure Control (AEC) for direct digital radiographic (DDR) X-ray systems", Radiation Protection Dosimetry, 147(1-2), pp.210~214 (2011)