Reducing noise in suspected glaucomatous visual fields by using a new spatial filter
Reducing noise in suspected glaucomatous visual fields by using a new spatial filter
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DOI：
10.1016/s0042-6989(03)00474-7
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发表时间：
2004-04-01
期刊：
影响因子：
1.8
通讯作者：
Hitchings, RA
中科院分区：
文献类型：
--
作者：
Gardiner, SK;Crabb, DP;Hitchings, RA
用自动视距仪进行的视野测试受到读数中存在的噪声量的阻碍。在这里，我们推导出一个生理上准确的空间过滤器，应用于患者检查后的数据。通过虚拟眼计算机仿真对该滤波器进行了测试。通过对一系列稳定视场的模拟，表明该方法提高了判断视场变化的特异性；在模拟进展领域（基于视神经头部的地图）时，显示灵敏度也有所提高。滤光片似乎可以减少青光眼视野数据中的噪声，可能在临床上有用。(C) 2004 Elsevier Ltd.版权所有。
Visual field testing with automated perimetry is hampered by the amount of noise present in the readings. Here, we derive a physiologically accurate spatial filter to be applied to the data after patient examination. The filter was tested by a Virtual Eye computer simulation. By simulating series of stable fields it was shown that specificity of determining visual field changes was improved; while simulating progressing fields (based on a map of the optic nerve head) it was shown that sensitivity was also improved. The filter appears to reduce the noise in glaucomatous visual field data and may be clinically useful. (C) 2004 Elsevier Ltd. All rights reserved.