Ikushima Yoichiro, Morishita Junji, Akamine Hiroshi, Nakamura Yasuhiko, Hashimoto Noriyuki
Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan,
Radiol Phys Technol. 2014 Jan;7(1):51-6. doi: 10.1007/s12194-013-0230-5. Epub 2013 Aug 10.
A visual assessment method of the angular performance in medical liquid-crystal displays (LCDs) by use of the "ANG test pattern" was proposed by Badano and the International Electrotechnical Commission. Our goals were to examine the effect of ambient illuminance on the visual assessment, and to investigate whether our modified visual assessment (with the ANG test pattern) can be used instead of the conventional assessment based on luminance measurements. As the ambient illuminance increased, the original scores obtained with the visual assessment decreased. The modified score of the visual assessment was in reasonable agreement with the results of the luminance-based assessment. We conclude that the visual assessment with the ANG test pattern should be performed in a room with constant ambient illuminance, and the modified visual assessment could have the potential to be used instead of the luminance-based assessment for quality assurance of medical LCDs.
巴达诺和国际电工委员会提出了一种利用“ANG测试图案”对医用液晶显示器（LCD）的角度性能进行视觉评估的方法。我们的目标是研究环境照度对视觉评估的影响，并调查我们改进后的视觉评估（使用ANG测试图案）是否可以替代基于亮度测量的传统评估。随着环境照度的增加，通过视觉评估获得的原始分数降低。视觉评估的改进分数与基于亮度的评估结果合理一致。我们得出结论，应在环境照度恒定的房间内使用ANG测试图案进行视觉评估，并且改进后的视觉评估有可能替代基于亮度的评估用于医用LCD的质量保证。
