METHODS: Ten large format displays used in IR and CC suites were evaluated. A visual inspection of available test patterns was performed followed by a quantitative evaluation of several performance characteristics including luminance ratio, luminance response function, and luminance uniformity. Additionally, the local ambient lighting conditions were evaluated.
RESULTS: Luminance ratios ranged from 243.0 to 1182.1 with a mean value of 500.1 ± 289.2. The maximum deviation between the luminance response function and the DICOM Grayscale Standard Display Function ranged from 11.2% to 38.3% with a mean value of 26.2% ± 10.9%. When evaluating luminance uniformity, the mean maximum luminance deviation was 13.2% ± 3.5%. The mean value of luminance deviation from the median was 7.8% ± 1.0%. Measured values of background illuminance ranged from 29.1 to 310.0 lux with a mean value of 107.6 lux ± 80.4 lux. While no mura or bad pixels were observed during visual inspection, damage including scrapes and scratches as well as smudges was common to most of the displays.
CONCLUSIONS: This work provides much needed data for the characterization of the performance of the large format displays used in IR and CC laboratory suites. These data may be used as a point of comparison when implementing a display QA program.
方法:评估了IR和CC套件中使用的十种大格式显示器。对可用的测试图案进行目视检查,然后对包括亮度比在内的几种性能特征进行定量评估。亮度响应函数,和亮度均匀性。此外,对当地环境照明条件进行了评估。
结果:亮度比范围为243.0至1182.1,平均值为500.1±289.2。亮度响应函数与DICOM灰度标准显示函数之间的最大偏差范围为11.2%至38.3%,平均值为26.2%±10.9%。在评估亮度均匀性时,平均最大亮度偏差为13.2%±3.5%。与中值的亮度偏差的平均值为7.8%±1.0%。背景照度的测量值范围为29.1至310.0勒克斯,平均值为107.6勒克斯±80.4勒克斯。虽然在目视检查期间没有观察到mura或坏像素,大多数显示器都很常见,包括擦伤和划痕以及污迹。
结论:这项工作为表征IR和CC实验室套件中使用的大格式显示器的性能提供了急需的数据。当实施显示QA程序时,这些数据可以用作比较点。