基于胶片成像和数字成像判断的视网膜后照法晶状体混浊估计值的可比性。
The comparability of estimates of retroilluminated lens opacities as judged from film-based and digital imaging.
作者信息
Klein Barbara E K, Klein Ronald, Hall Ellen R, Lee Kristine E, Jensen Karl
机构信息
Department of Ophthalmology and Visual Sciences, University of Wisconsin Medical School, Madison, Wisconsin 53726, USA.
出版信息
Am J Ophthalmol. 2004 Oct;138(4):668-70. doi: 10.1016/j.ajo.2004.04.068.
PURPOSE
Neitz film-based retroillumination cameras, the standard for documenting retroilluminated lens opacities for epidemiologic studies, are no longer produced. A digital imaging system is now available for imaging these opacities. We sought to compare gradings of images from both systems.
DESIGN
Comparison of technique.
METHODS
One hundred fourteen lenses were imaged with both systems and graded according to protocols. Concordance between the methods was compared using kappa statistics.
RESULTS
There was moderate concordance for cortical opacities (kappa = 0.63) and good concordance for posterior subcapsular opacities (kappa = 0.83). Grades from digital images slightly underestimated the frequency and severity of cortical cataract.
CONCLUSION
Digital imaging of retroilluminated lens opacities results in similar classification of the severity of opacities. It will be useful for epidemiologic studies of cortical (CC) and posterior subcapsular cataracts (PSC).
目的
用于记录流行病学研究中后照式晶状体混浊的标准设备——奈茨胶片后照式相机已不再生产。现在有一个数字成像系统可用于对这些混浊进行成像。我们试图比较这两种系统所成图像的分级情况。
设计
技术比较。
方法
用这两种系统对114只晶状体进行成像，并根据方案进行分级。使用kappa统计量比较两种方法之间的一致性。
结果
皮质性混浊的一致性为中等（kappa = 0.63），后囊下混浊的一致性良好（kappa = 0.83）。数字图像的分级略微低估了皮质性白内障的频率和严重程度。
结论
后照式晶状体混浊的数字成像在混浊严重程度的分类上结果相似。它将有助于皮质性（CC）和后囊下白内障（PSC）的流行病学研究。
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