변조전달함수 방법에서 엣지 장치 설정에 대한 각도 최적화 평가
Evaluation of Angle Optimization on Edge Test Device Setting in Modulation Transfer Function
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
This study was purpose to evaluation of Modulation Transfer Function in Measurements by using the International electrotechnical commission standard(IEC 62220-1) which were edge device each angle by using edge method. In this study was Aero(Konica, Japan) image receptor which is a indirect Flat panel detector(FPD) was used. The size of matrix 1994 × 2430 (14″× 17″inch) which performed 12 bit processing and pixel pitch is 175 μm. The results of shown as MTF measurements at IEC standard. The amount of data seemed reasonable and at an MTF value of 0.1 the spatial frequencies were 2.56 cycles/mm at an angle of 2.4o. MTF value of 0.5 the spatial frequencies were 1.32 cycles/mm at an angle of 2.4o. This study were to evaluate MTF by setting each angle 2.0o∼2.8o degrees the most effective optimal edge angle and to suggest the quantitative methods of measuring by using IEC.
Abstract
This study was purpose to evaluation of Modulation Transfer Function in Measurements by using the International electrotechnical commission standard(IEC 62220-1) which were edge device each angle by using edge method. In this study was Aero(Konica, Japan) image receptor which is a indirect Flat panel detector(FPD) was used. The size of matrix 1994 × 2430 (14″× 17″inch) which performed 12 bit processing and pixel pitch is 175 μm. The results of shown as MTF measurements at IEC standard. The amount of data seemed reasonable and at an MTF value of 0.1 the spatial frequencies were 2.56 cycles/mm at an angle of 2.4o. MTF value of 0.5 the spatial frequencies were 1.32 cycles/mm at an angle of 2.4o. This study were to evaluate MTF by setting each angle 2.0o∼2.8o degrees the most effective optimal edge angle and to suggest the quantitative methods of measuring by using IEC.
참고문헌 (17)
- 정회원, "CsI(TI) Indirect Flat Panel Detector의 선질에 따른 물리적 영상 평가", 방사선기술과학, 35(2), pp.109~117 (2012), 대한방사선과학회[DOI]
- 정회원, "다양한 디지털 방사선 시스템의 물리적 영상 특성 조사", 방사선기술과학, 40(3), pp.363~370 (2017), 대한방사선과학회[DOI]
- 민정환, "간접평판형 검출기에서 변조전달함수 측정 시 Edge 각도에 따른 비교 연구", 방사선기술과학, 42(4), pp.259~263 (2019), 대한방사선과학회
- "IEC (International Electrotechnical Commission)62220-1. Medical electrical equipment Characteristics of digital X-ray imaging devices Part 1: determination of the detective quantum efficiency", ~ (2003)
- 김기원, "컴퓨터단층검사에서 AAPM Phantom을 이용한 변조전달함수 평가", 방사선기술과학, 39(2), pp.193~198 (2016), 대한방사선과학회[DOI]
- 손순룡, "Evaluation of Image Quality for Various Electronic Portal Imaging Devices in Radiation Therapy", 방사선기술과학, 38(4), pp.451~461 (2015), 대한방사선과학회[DOI]
- Fujita H, "A simple method for determining the modulation transfer function in digital radiography", IEEE Trans Med Imaging, 11(1), pp.34~39 (1992)
- Samei E, "A method for measuring the presampled MTF of digital radiographic systems using an edge test device", Medical Physics, 25, pp.102~ (1998)
- Greer PB, "Evaluation of an algorithm for the assessment of the MTF using an edge method", Medical Physics, 27, pp.2048~ (2000)
- 김기원, "유방영상에서 엣지를 이용한 물리적 영상 평가", 방사선기술과학, 39(3), pp.415~420 (2016), 대한방사선과학회[DOI]
- 손순룡, "Measurement of Image Quality According to the Time of Computed Radiography System", 방사선기술과학, 38(4), pp.365~374 (2015), 대한방사선과학회[DOI]
- Granfors PR, "Performance of a 41×41cm2 amorphous silicon flat panel X-ray detector for radiographic imaging applications", Med Phys, 27(6), pp.1324~1333 (2000)
- Antonuk LE, "Demonstration of megavoltage and diagnostic X-ray imaging with hydrogenated amorphous silicon arrays", Med Phys, 19(6), pp.1455~1466 (1992)
- Finc C, "Clinical comparative study with a large-area amorphous silicon flat-panel detector : image quality and visibility of anatomic structures on chest radiography", Am J Roentgenol, 178(2), pp.481~486 (2001)
- Bacher K, "Dose reduction in patients undergoing chest imaging : digital amorphous silicon flat-panel detector radiography versus conventional film screen radiography and phosphor-based computed radiography", Am J Roentgenol, 181(4), pp.923~929 (2003)
- 민정환, "간접평판형 검출기에서 국제전자기술위원회 기준을 통한 잡음전력스펙트럼 비교 연구", 방사선기술과학, 41(5), pp.457~462 (2018), 대한방사선과학회[DOI]
- 민정환, "1.5T 자기공명영상을 이용한 물리적 영상 특성에 대한 연구", 방사선기술과학, 42(5), pp.329~334 (2019), 대한방사선과학회[DOI]