检索结果-南通市图书馆

世界核心医学期刊文摘(眼科学分册) 2006年第4期 34-35页

作者： strouthidis n.g. White E.T. Owen V.M.F. D.F. garway-Heath 宋虎平 Dr. glaucoma Research Unit Moorfields Eye Hospital 162 City Road London EC1V 2PD United Kingdom

Aims: To evaluate the test-retest variability of stereometric parameter measurements made with the Heidelberg retina tomograph (HRT) and Heidelberg retina tomograph -II (HRT-II), and to establish which parameter(s) provided the most repeatable and reliable measurements with both devices. An investigation into the factors affecting the repeatability of the measurements of this parameter(s) was conducted. Methods: 43 ocular hypertensive and 31 glaucoma subjects were recruited to a test-retest study. One eye from each subject underwent HRT and HRT-II imaging by two observers on each of two occasions within 6 weeks of each other. Lens grading was carried out by LOCS III grading and Scheimpflug camera generated densitogram analysis. Results: Rim area (RA) and mean cup depth measurements were found to be least variable. Both inter-test reference height difference and image quality had a strong relation (R2 > 0.5, p nter-test RA difference and, together, are responsible for 70%of RA measurement variability. Image quality was influenced by lens opacity, cylindrical error, and age. Inter-test RA measurement differences were unrelated to the observer or visit interval. Conclusions: RA represents an appropriate measure for monitoring glaucomatous progression. Reference height difference and image quality were the factors thatmost influenced RA measurement variability. Image analysis strategies that address these factors may reduce test-retest variability.

关键词：眼底照相机变异性海德堡

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

提高海德堡眼底照相机和海德堡眼底照相机Ⅱ盘缘测量结果的可重复性

引用

世界核心医学期刊文摘(眼科学分册) 2006年第4期 35-35页

作者： strouthidis n.g. White E.T. Owen V.M.F. D.F. garway-Heath 宋虎平 Dr. glaucoma Research Unit Moorfields Eye Hospital 162 City Road London EC1V 2PD United Kingdom

Aims: To devise and test strategies for improving Heidelberg retina tomograph (HRT andHRT-II) rim area (RA) repeatability and assess the benefit of the strategies in time series of HRT images. Methods: The effect of the standard and 320 μm reference planes and image quality on RA repeatability was assessed in a test-retest HRT image dataset from 74 subjects. A longitudinal HRT image dataset from 30 ocular hypertensive subjects was analysed by linear regression of RA over time, with each of the reference planes and using a manual image alignment facility. RA variability was estimated by comparing the standard deviation of residuals (RSD) generated by each linear regression. Results: RA repeatability was better with the 320 μm reference plane (repeatability coefficient 0.17 mm2), improving further with only good quality images (repeatability coefficient 0.08 mm2). For the longitudinal data, a significant (p n in the RSD from 0.10 to 0.05 mm2 was obtained with the 320 μm reference plane. Manual alignment led to a further significant (pn in the RSD to 0.04 mm2. Conclusions: The findings support the use of a 320 μm reference plane and manual image alignment to analyse RA over time. The estimates of RA repeatability may be used to define thresholds for glaucomatous change.

关键词：眼底照相机可重复性定位平面盘缘海德堡

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：