Pärtan Gerald, Mayrhofer Rudolf, Urban Michael, Wassipaul Manfred, Pichler Ludwig, Hruby Walter
Department of Radiology, Danube Hospital, Langobardenstrasse 122, 1220 Vienna, Austria.
Eur Radiol. 2003 Oct;13(10):2397-401. doi: 10.1007/s00330-003-1822-y. Epub 2003 Feb 19.
The aim of this study was to evaluate feasibility of reporting brain CT examinations on liquid crystal display (LCD) flat-screen monitors vs state-of-the-art cathode-ray-tube (CRT) monitors. Ninety-five brain CT examinations of 95 patients were displayed on Picture archiving and communications system (PACS) workstations equipped either with a dedicated medical imaging LCD colour monitor or on a high-resolution CRT which is used for routine reporting of CT, MRI and digital radiography images in our institution. Fifty cases were negative and 45 cases were positive for early brain infarction (EBI), the latter being defined by a combination of one or more signs: dense artery; hypodensity of brain parenchyma; and local brain swelling verified by control scans. Ten radiologists had to rate presence or absence of EBI on a five-point scale. Ratings were evaluated by CORROC2 ROC software and areas under the ROC curve (A(z)) were computed. Significance of differences between the two viewing conditions were evaluated with Wilcoxon test. Mean A(z) of the ten observers was 0.7901 with LCD vs 0.7695 with CRT which did not show statistical significance (p=0.2030). In the setting investigated, reporting of CT studies from high-performance LCD monitors seems feasible without significant detriment to diagnostic performance.
本研究的目的是评估在液晶显示器（LCD）平板显示器与最先进的阴极射线管（CRT）显示器上报告脑部CT检查的可行性。对95例患者的95次脑部CT检查结果分别在配备专用医学成像LCD彩色显示器的图像存档与通信系统（PACS）工作站上，以及在我院用于CT、MRI和数字X线摄影图像常规报告的高分辨率CRT显示器上进行显示。50例为早期脑梗死（EBI）阴性，45例为阳性，后者由以下一种或多种征象综合定义：动脉致密；脑实质低密度；以及通过对照扫描证实的局部脑肿胀。10名放射科医生必须以五点量表对EBI的有无进行评分。评分由CORROC2 ROC软件评估，并计算ROC曲线下面积（A(z)）。用Wilcoxon检验评估两种观察条件之间差异的显著性。10名观察者在LCD上的平均A(z)为0.7901，在CRT上为0.7695，差异无统计学意义（p = 0.2030）。在所研究的环境中，使用高性能LCD显示器报告CT研究似乎是可行的，且不会对诊断性能造成显著损害。
