Beard D V, Hemminger B M, Perry J R, Mauro M A, Muller K E, Warshauer D M, Smith M A, Zito A J
Department of Radiology, School of Medicine, University of North Carolina, Chapel Hill 27599-7510.
Radiology. 1993 May;187(2):565-9. doi: 10.1148/radiology.187.2.8475309.
A prototype single-screen workstation with a 2,048 x 2,560-pixel high-brightness monitor, 0.11-second image display time, and simple ergonomic design was compared to a conventional horizontal film alternator in diagnostic interpretation of chest computed tomography (CT) studies. Four radiologists used either the workstation or film alternator in interpretation of studies obtained in 10 patients. A counterbalanced within-subject repeated measures experimental design was used. Response times were analyzed for both methods of interpretation. Grades of excellent, acceptable, and unacceptable were assigned by a blinded "grader" to reports of the radiologists. The average time needed for an interpretation at the workstation was 5.65 minutes. No interpretations were graded unacceptable. Retrospective power analysis showed that 16 observers rather than four would have been required to show that use of the workstation was faster than the alternator. With this 95% confidence interval, the workstation interpretation time is clinically equivalent to that with the alternator. These data show that this type of workstation has practical application in interpretation of CT, magnetic resonance imaging, and ultrasound studies.
将一台配备2048×2560像素高亮度显示器、图像显示时间为0.11秒且设计简单符合人体工程学的单屏工作站，与传统的水平胶片交替放映机在胸部计算机断层扫描（CT）研究的诊断解读中进行了比较。四位放射科医生在解读10名患者的研究结果时，使用了该工作站或胶片交替放映机。采用了受试者内平衡重复测量实验设计。分析了两种解读方法的反应时间。一位不知情的“评分员”对放射科医生的报告给出了优秀、可接受和不可接受的等级评定。在工作站进行一次解读所需的平均时间为5.65分钟。没有解读被评为不可接受。回顾性功效分析表明，若要证明使用该工作站比使用交替放映机速度更快，需要16名观察者而非4名。在这个95%的置信区间内，工作站的解读时间在临床上与交替放映机相当。这些数据表明，这种类型的工作站在CT、磁共振成像和超声研究的解读中具有实际应用价值。
