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NEMA Standard XR-21 Phantom 을 이용한 혈관조영 장치의 성능 평가 ( 특수의료장비 기초 연구 자료 ) 신구대학 방사선과 강 병 삼강 병 삼
Purpose 2 IVR 장치의 성능평가를 위한 적절한 검사기준 및 검사방법을 마련 한다 1 2 장치, 화질, 선량 관리
Evaluation Item Spatial Resolution Image-field Geometry Visibility Moving Target Image Distortion Low-contrast Iodine Detectability Phantom Entrance Dose Evaluation Item
Equipments NEMA Standard XR-21 Phantom 6 5 3 1 2 4 5 5 isocenter 50mm Dose measurement point (25mm below phantom) X-ray tube
Equipments 지 역지 역측정병원 수 장비 대수 계 II TypeFD Type 전 체전 체 21181937 수도권 43811 부 산부 산 4527 대 구대 구 4347 대 전대 전 2123 광 주광 주 3224 강 원강 원 111 전 북전 북 3314 전국 120 개 장비 중 50% 이상 측정 예정
Method Image–field Geometry (Beam alignment test) Perfect Acceptable Unacceptable
Method Spatial Resolution & Low Contrast Iodine Detectability Normal1st Mag.2nd Mag. Iodine Concentration ; 200, 100, 50, 25 mg/cc
Method Visibility Moving Target Wire Diameter ; 0.022, 0.016, 0.012, 0.009, 0.005 inches X-ray tube Test plate SID Irradiated field Visualized field
Method Visibility Moving Target
Method Phantom Entrance Dose Ion-chamber
Method Image Distortion UP DOWN LEFTRIGHT
Result Spatial Resolution Device Type Magnification Spatial Resolution MinMaxMean3 rd 이론치 II Type (18 units) Normal0.81.21.0 ± 0.11.01.4 1st Mag.1.01.61.3 ± 0.21.21.65 2nd Mag.126.96.36.199 ± 0.21.52.05 3rd Mag.188.8.131.52 ± 0.21.82.56 FD Type (19 units) Normal184.108.40.206 ± 0.11.21.4 1st Mag.220.127.116.11 ± 0.11.51.6 2nd Mag.18.104.22.168 ± 0.21.72.1 3rd Mag.2.02.42.1 ± 0.22.03.05 (Lp/mm)
Result Low-contrast Iodine Detectability Device TypeMagnification Iodine Concentration (mg/cc) 2001005025 II Type (18 units) Normal134 1st Mag.126 2nd Mag.810 3rd Mag.711 FD Type (19 units) Normal612 1st Mag.217 2nd Mag.217 3rd Mag.1171 (Number of device)
Result Device TypeMagnification Phantom Entrance Dose MinMaxMeanOver 10 R/min II Type (18 units) Normal0.87.74.0 ± 2.72 1st Mag.1.812.35.5 ± 3.73 2nd Mag.2.013.17.3 ± 3.65 3rd Mag.6.612.28.9 ± 1.88 FD Type (19 units) Normal22.214.171.124 ± 2.10 1st Mag.126.96.36.199 ± 1.90 2nd Mag.2.910.05.9 ± 2.60 3rd Mag.3.812.97.4 ± 3.31 (R/min) Phantom Entrance Dose
Result Device Type Using Period Magnification Using Period of Device Type Spatial Resolution (Lp/mm) Phantom Entrance Dose (R/min) II Type (18 units) Over 7y. (8 units) Normal0.9 ± 0.13.1 ± 4.3 1st Mag.1.1 ± 0.24.0 ± 4.6 Under 7y. (10 units) Normal1.1 ± 0.34.9 ± 2.4 1st Mag.1.4 ± 0.36.8 ± 4.5 FD Type (19 units) Over 3y. (3 units) Normal1.5 ± 0.12.8 ± 0.8 1st Mag.1.8 ± 0.12.5 ± 0.3 Under 3y. (16 units) Normal1.3 ± 0.23.6 ± 1.7 1st Mag.1.6 ± 0.23.9 ± 1.7
Result Device Type Magnifi -cation II TypeFD Type Spatial Resolution (Lp/mm) Phantom Entrance Dose (R/min) Spatial Resolution (Lp/mm) Phantom Entrance Dose (R/min) PHILIPS Normal1.2 ± 0.25.1 ± 2.41.4 ± 0.12.6 ± 0.2 1st Mag.1.5 ± 0.37.1 ± 5.01.7 ± 0.13.1 ± 0.2 GE Normal0.8 ± 0.16.9 ± 4.01.4 ± 0.13.3 ± 0.5 1st Mag.1.1 ± 0.28.4 ± 3.61.6 ± 0.24.2 ± 1.7 SIEMENS Normal0.9 ± 0.10.8 ± 0.31.4 ± 0.14.0 ± 2.5 1st Mag.1.2 ± 0.21.6 ± 1.31.7 ± 0.23.8 ± 2.4
Result Device Type Magnification Wire Resolution - State (inch) None0.0220.0160.0120.0090.005 II Type (18 units) Normal1548 1st Mag.3573 2nd Mag.683 3rd Mag.3105 FD Type (19 units) Normal5131 1st Mag.1122 2nd Mag.154 3rd Mag.127 Wire Resolution (State)
Result Device typeMagnification Wire Resolution - Motion (inch) None0.0220.0160.0120.0090.005 II Type (18 units) Normal42741 1st Mag.15183 2nd Mag.3456 3rd Mag.33210 FD Type (19 units) Normal1117 1st Mag.415 2nd Mag.1162 3rd Mag.136 Wire Resolution (Motion)
Result Beam Alignment Test & Image Distortion Direction Image Distortion Rate (%) MinMaxMean Up/Down0125.0 ± 4.2 Left/Right0194.2 ± 4.8 Beam Alignment Test PerfectAcceptableUnacceptable 2 (5.5%)14 (37.8%)21 (56.7%)
Evaluation Not enough of the difference in the case of dose measurements. FD type device excellent at a most of the performance tests. Conclusion
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