Visual evoked potentials with CRT and LCD monitors When newer is not better
Visual evoked potentials with CRT and LCD monitors When newer is not better
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DOI：
10.1212/01.wnl.0000339041.29147.5f
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发表时间：
2009-01-13
期刊：
影响因子：
9.9
通讯作者：
Shah, Dharmen
中科院分区：
文献类型：
--
作者：
Husain, Aatif M.;Hayes, Susan;Shah, Dharmen
背景：图形翻转视觉诱发电位（PRVEP）的刺激传统上是由阴极射线管（CRT）监视器提供的。液晶显示器（LCD）监视器已经变得更便宜，并且在许多应用中代替CRT监视器使用。我们测试的假设，液晶显示器是等效的CRT显示器时，用于PRVEP.Methods：单眼，全视野PRVEP与32'检查大小在6名正常受试者与CRT显示器和液晶显示器具有2毫秒，8毫秒，和30毫秒的响应时间。结果：CRT显示器P100潜伏期平均为107.7（+/- 6.6）ms，LCD 2 msec监视器为115.7（+/- 6.9; p < 0.0001）ms，LCD 8 msec监视器为118.5（+/- 6.5; p < 0.0001）ms，LCD 30 msec监视器为156.8 +/- 6.8; p +/- 0.0001）ms。结论：目前可用的液晶显示器（LCD）监视器不能提供与阴极射线管（CRT）监视器相当的数据。除非获得新的标准数据，否则LCD监视器不能取代CRT监视器用于图形翻转视觉诱发电位。神经病学（R）2009; 72：162 - 164
Background: The stimulus for pattern reversal visual evoked potentials (PRVEP) has traditionally been delivered by a cathode ray tube (CRT) monitor. Liquid crystal display (LCD) monitors have become more affordable and are being used instead of CRT monitors for many applications. We tested the hypothesis that LCD monitors were equivalent to CRT monitors when used for PRVEP.Methods: Monocular, full field PRVEP with a 32' check size were obtained in six normal subjects with a CRT monitor and LCD monitors having 2 msec, 8 msec, and 30 msec response times. The average P100 latency with the CRT screen was compared to the latencies with the LCD screens.Results: The mean P100 latency of the CRT monitor was 107.7 (+/- 6.6) ms, for the LCD 2 msec monitor was 115.7 (+/- 6.9; p < 0.0001) ms, for the LCD 8 msec monitor was 118.5 (+/- 6.5; p < 0.0001) ms, and the LCD 30 msec monitor was 156.8 +/- 6.8; p +/- 0.0001) ms.Conclusions: Currently available liquid crystal display (LCD) monitors do not provide data comparable to cathode ray tube (CRT) monitors. LCD monitors cannot replace CRT monitors for pattern reversal visual evoked potentials unless new normative data are obtained. Neurology (R) 2009; 72: 162 - 164