首页> 外文期刊>British journal of ophthalmology >Agreement in assessing optic discs with a digital stereoscopic optic disc camera (Discam) and Heidelberg retina tomograph.
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Agreement in assessing optic discs with a digital stereoscopic optic disc camera (Discam) and Heidelberg retina tomograph.

机译:使用数字立体视盘摄像机(Discam)和海德堡视网膜断层扫描仪评估视盘的协议。

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AIMS: To assess the intraobserver agreement, interobserver agreement, and the agreement between a digital stereo optic disc camera (Discam) and Heidelberg retina tomograph (HRT) in measuring area cup-disc ratio (ACDR) and radial cup-disc ratio (RCDR) by two observers. METHODS: The optic discs of 78 eyes of 39 people (17 cases of primary open angle glaucoma, eight normal tension glaucoma, two ocular hypertension, and 12 normal subjects) were imaged with Discam and HRT. Two observers independently drew the disc margins on the HRT mean topography images and the disc and cup margins on the Discam images. ACDR and the RCDR at various angles were measured with the two systems. Intraobserver agreement, interobserver agreement, and the agreement between the two systems were assessed by 95% tolerance limit of changes (TC) and intraclass correlation coefficient (ICC). RESULTS: Eight eyes were excluded due to poor image quality (six Discam and two HRT). 70 eyes were analysed. The intraobserver ACDR agreement was almost perfect in both systems (ICCs = 0.97 and 0.92, and TCs = 11.0% and 15.1% in HRT and Discam respectively). The interobserver ACDR agreement was almost perfect in HRT (ICC = 0.97) and substantial in Discam (ICC = 0.79), (TCs = 10.5% and 24.5% respectively). The ACDR agreement between the two systems was substantial in observer A (ICC = 0.67) and moderate in observer B (ICC = 0.53), (TCs = 24.8% and 46.7% respectively). The HRT measured the ACDR significantly larger than the Discam (p <0.001), and the differences were significantly larger in the glaucomatous group (p <0.001). RCDR agreement between the two systems was fair to substantial in observer A (ICC = 0.36 to 0.74) and slight to moderate in observer B (ICC = 0.12 to 0.45). Both observers achieved the best RCDR agreement between the two systems at the inferior optic disc position. CONCLUSION: There is almost perfect intraobserver agreement in each system. The interobserver agreement was better with the HRT than the Discam. There was substantial variation in ACDR and RCDR agreement between the two systems measured by the two observers. The variation in ACDR and RCDR measurements between the two systems may be too large for interchangeable use in a clinical setting.
机译:目的:评估观察者内部协议,观察者间协议以及数字立体光盘摄像机(Discam)与海德堡视网膜断层扫描仪(HRT)之间在测量面积杯盘比(ACDR)和径向杯盘比(RCDR)方面的协议由两名观察员。方法:用Discam和HRT对39人(17例原发性开角型青光眼,8例正常张力性青光眼,2例高眼压和12例正常人)的78眼视盘进行成像。两名观察员分别在HRT平均地形图像上绘制了光盘边缘,在Discam图像上绘制了光盘边缘和杯状边缘。使用两个系统测量了不同角度的ACDR和RCDR。观察者内部一致性,观察者之间一致性以及两个系统之间的一致性通过95%的变化容忍度(TC)和组内相关系数(ICC)进行评估。结果:由于图像质量较差而排除了八只眼(六只Discam和两只HRT)。分析了70只眼睛。观察者内ACDR协议在两个系统中都几乎完美(ICC = 0.97和0.92,TC在HRT和Discam中分别为11.0%和15.1%)。观察者间ACDR协议在HRT(ICC = 0.97)中几乎是完美的,而在Discam(ICC = 0.79)中则是实质性的(TCs分别为10.5%和24.5%)。两个系统之间的ACDR协议在观察者A中是重要的(ICC = 0.67),在观察者B中是中等的(ICC = 0.53)(TC分别为24.8%和46.7%)。 HRT测量的ACDR显着大于Discam(p <0.001),青光眼组的差异显着更大(p <0.001)。在观察者A中,两个系统之间的RCDR协议是相当公平的(ICC = 0.36至0.74),而在观察者B中则是轻微至中等(ICC = 0.12至0.45)。两位观察者在视盘下方的位置获得了两个系统之间的最佳RCDR协议。结论:每个系统中几乎都有完美的观察者内部协议。 HRT的观察员间协议比Discam更好。由两个观察者测得的两个系统之间的ACDR和RCDR协议存在很大差异。两个系统之间的ACDR和RCDR测量值差异可能太大,无法在临床环境中互换使用。

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