Precht Helle, Outzen Claus Bjørn, Kusk Martin Weber, Bisgaard Malene, Waaler Dag
Health Sciences Research Centre, UCL University College, Niels Bohrs Allé 1, 5230 Odense M, Denmark.
Department of Radiology, Kolding, Lillebaelt Hospital, University Hospitals of Southern Denmark, Sygehusvej 24, 6000 Kolding, Denmark.
Radiat Prot Dosimetry. 2021 May 31;194(1):27-35. doi: 10.1093/rpd/ncab067.
The purpose of this study was to investigate the challenges in comparing digital radiography (DR) systems from different vendors for various combinations of exposure factors in posterior-anterior hand radiographs. Image quality was evaluated for a range of tube voltages and tube current-time products using a technical contrast-detail (CDRAD) phantom and an anthropomorphic hand phantom. 900 technical CDRAD images were analysed providing quality figures of merit (IQFinv) and two experienced reporting radiographers using visual grading analysis (VGA) scored 108 anthropomorphic images. This study demonstrates the differences between the DR systems included. When compensating for variations in dose, Canon showed superior results for technical image quality and Fuji for visual image quality for a standard dose point at DR hand examination (ln(DAP) 1.1, 50 kV and 2.5 mAs).
本研究的目的是调查在比较不同供应商的数字射线摄影（DR）系统用于后前位手部X光片的各种曝光因素组合时所面临的挑战。使用技术对比度细节（CDRAD）体模和仿真手模，对一系列管电压和管电流-时间乘积下的图像质量进行了评估。分析了900张技术CDRAD图像以提供质量优值（IQFinv），两名经验丰富的报告放射技师使用视觉分级分析（VGA）对108张仿真图像进行了评分。本研究证明了所纳入的DR系统之间的差异。在补偿剂量变化时，对于DR手部检查的标准剂量点（对数空气比释动能面积[ln(DAP)]为1.1、50 kV和2.5 mAs），佳能在技术图像质量方面显示出更好的结果，而富士在视觉图像质量方面表现更佳。
