Quantification of Ellipsoid Zone Changes in Retinitis Pigmentosa Using en Face Spectral Domain-Optical Coherence Tomography

Quantification of Ellipsoid Zone Changes in Retinitis Pigmentosa Using en Face Spectral Domain-Optical Coherence Tomography
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DOI:
10.1001/jamaophthalmol.2016.0502
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发表时间:
2016-06-01
期刊:
影响因子:
8.1
通讯作者:
Sadda, SriniVas R.
Sadda, SriniVas R.
中科院分区:
医学1区
文献类型:
--
作者:
Hariri, Amir H.;Zhang, Hong Yang;Sadda, SriniVas R.

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重要性 需要新的方法来量化色素性视网膜炎 (RP) 的外部视网膜结构的变化。 目的 通过量化正面谱域光学相干断层扫描 (SD-OCT) 图像上的 EZ 区域,实施另一种方法来跟踪 RP 中的椭圆体区 (EZ) 变化。 设计、设置和参与者 本观察性案例研究的数据是在美国大学眼科收集的加利福尼亚州洛杉矶,时间为 2015 年 5 月 1 日至 7 月 30 日,其中包括口服丙戊酸治疗色素性视网膜炎试验中一部分患者的 SD-OCT 图像。为了符合正面 OCT 亚分析的条件,保留的 EZ 区域需要限制在 SD-OCT 扫描区域内。排除 EZ 带延伸至任何 B 扫描或最上或最下 B 扫描边缘的病例。所有纳入病例的 SD-OCT 图像均导入制造商的软件中,以生成 EZ 水平的正面图像。两名经过认证的 SD-OCT 分级员独立地描绘了 En Face 图像上保留的 EZ 的边界。 主要结果和措施 比较 RP 患者生成的 En Face 图像的 2 个掩模分级,以确保分级员之间的一致性和方法的有效性。 结果 在 43 名拥有体积 SD-OCT 数据的可用患者中,24 名患者的 45 只眼睛符合资格标准,并纳入本次分析。每名患者均进行 2 次就诊,间隔 1 年,共 90 张正面 OCT 图像并进行分级。每次访问的 2 名独立评分者之间的平均 (SD) 绝对差异和百分比差异分别为 0.08 (0.10) mm(2) 和 4.5%(5.9%)。 2 年级学生确定的 EZ 面积表现出极好的一致性,组内相关系数为 0.996(95% CI,0.995-0.997;P < .001)。 结论和相关性 对 RP 患者正面 SD-OCT 图像上保留的 EZ 面积进行量化是一种有效且可重复的方法。 Enface SD-OCT 量化可能是监测晚期 RP 患者 EZ 变化的有用工具,也是治疗试验中有用的结果测量变量。
IMPORTANCE New methods are needed to quantify the change in the outer retinal structures in retinitis pigmentosa (RP).OBJECTIVE To implement an alternate method for tracking ellipsoid zone (EZ) changes in RP by quantifying the EZ area on en face spectral domain-optical coherence tomographic (SD-OCT) images.DESIGN, SETTING, AND PARTICIPANTS Data for this observational case study were collected at the Department of Ophthalmology, University of California, Los Angeles, from May 1 to July 30, 2015, and included SD-OCT images of a subset of patients from the Trial of Oral Valproic Acid for Retinitis Pigmentosa. To be eligible for the en face OCT subanalysis, the preserved EZ area was required to be limited to the SD-OCT scanning field. Cases in which the EZ band extended to the margins of any B-scan or the most superior or inferior B-scan were excluded. The SD-OCT images of all included cases were imported into the manufacturer's software to generate en face images at the level of the EZ. Two certified SD-OCT graders independently delineated the boundaries of the preserved EZ on the en face images.MAIN OUTCOMES AND MEASURES Comparison of the 2 masked gradings of the generated en face images of patients with RP for agreement between the graders and the validity of the method.RESULTS Of the 43 available patients with volume SD-OCT data, 45 eyes of 24 patients met the eligibility criteria and were included in this subanalysis. Every patient had 2 visits that were 1 year apart, which included a total of 90 en face OCT images that were graded. The mean (SD) absolute difference and percentage difference between the 2 independent graders for each visit were 0.08 (0.10) mm(2) and 4.5%(5.9%), respectively. The EZ area determined by the 2 graders showed excellent agreement with an intraclass correlation coefficient of 0.996 (95% CI, 0.995-0.997; P < .001).CONCLUSIONS AND RELEVANCE Quantification of the preserved EZ area on en face SD-OCT images of patients with RP is a valid and reproducible method. En face SD-OCT quantification may be a useful tool for monitoring the EZ changes of patients with advanced RP and a useful outcome measurement variable in therapeutic trials.