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Abstract：
OBJECTIVE: While the performance of displays used for the acquisition and primary interpretation of medical images has been well-characterized, notably absent are publications evaluating and discussing the performance of displays used in Interventional Radiology (IR) suites and Cardiac Catheterization (CC) laboratories. The purpose of this work was to evaluate the performance of these displays and to consider the challenges in implementation of display quality assurance practices in this environment.
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.
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.
摘要：
目的：虽然用于采集和初步解释医学图像的显示器的性能已得到很好的表征，值得注意的是，没有出版物评估和讨论介入放射学（IR）套件和心导管（CC）实验室中使用的显示器的性能。这项工作的目的是评估这些显示器的性能，并考虑在这种环境下实施显示器质量保证实践的挑战。
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。
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。
