Examination of the safety of the exclusive liquid crystal display monitor for diagnostic imaging and research on the test picture development for accuracy management.

液晶显示器的基本检查显示，IPS （In-plane Switching）模式和VA （vertical Aligned）模式最适合作为诊断成像的对象。虽然与CRT显示器相比，液晶显示器的亮度衰减时间要宽松得多，但当连续10000小时后，亮度下降到初始值的70-80%。早期亮度保持在监视器中，其中包括亮度稳定电路至少10,000小时。在对比度较低的情况下，可以用液晶显示器代替CRT显示器。室内照度的影响不显著，建议在明亮的照明下使用液晶显示器。即使与CRT显示器比较关于液晶显示器的诊断能力（1M, 2M, 3M, 5M）。也就是说，可以用CRT显示器代替液晶显示器进行诊断成像（乳房x光检查除外）。在使用3M液晶显示器的乳房x光片研究中，未见对不可触及的钙化病变的诊断能力下降。从这些研究结果可以得出结论，用于CRT显示器亮度退化判断的测试图片（临床图片和对比图）也适用于液晶显示器亮度退化判断。

Fundamental examination of a liquid crystal display monitor showed that IPS (In-plane Switching) mode and VA (Vertically Aligned) mode were most suitable as an object for diagnostic imaging. Although the time of luminosity degradation of a liquid crystal display monitor was far loose compared with the CRT monitor, when it became in continuation 10,000 hours, it turned out that luminosity falls to 70-80% of an initial value. Early luminosity is kept in the monitor in which the luminosity stabilization circuit is included for at least 10,000 hours. At the target of low contrast, a liquid crystal display can be used as substitution of a CRT monitor. The influence of indoor illumination was not significant and it was suggested also under bright lighting that a liquid crystal display can be used. even if compared with a CRT monitor about the diagnostic ability of a liquid crystal display monitor (1M, 2M, 3M, and 5M). That is, a liquid crystal display monitor can be replaced with a CRT monitor for diagnostic imaging (except for mammography). In the research of a mammo gram using 3M liquid crystal display monitor, the fall of the diagnostic ability of a non-palpable calcification lesion was not seen. From these research results, it is concluded that the test picture for the luminosity degradation judging of a CRT monitor (a clinical picture and contrast chart) would be applicable also to the luminosity degradation judging of a liquid crystal display monitor.