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首页> 外文期刊>Ophthalmic surgery, lasers & imaging: the official journal of the International Society for Imaging in the Eye >Calibration of fundus images using spectral domain optical coherence tomography.
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Calibration of fundus images using spectral domain optical coherence tomography.

机译：校准的眼底图像使用光谱域光学相干断层扫描。

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BACKGROUND AND OBJECTIVE: Measurements performed on fundus images using current software are not accurate. Accurate measurements can be obtained only by calibrating a fundus camera using measurements between fixed retinal landmarks, such as the dimensions of the optic nerve, or by relying on a calibrated model eye provided by a reading center. However, calibrated spectral domain OCT (SD-OCT) could offer a convenient alternative method for the calibration of any fundus image. PATIENTS AND METHODS: The ability to measure exact distances on SD-OCT fundus images was tested by measuring the distance between the center of the fovea and the optic nerve. Calibrated SD-OCT scans measuring 6 X 6 X 2 mm centered on the fovea and the optic nerve were analyzed in 50 healthy right eyes. The foveal center was identified using cross-sectional SD-OCT images, and the center of the optic nerve was identified manually. The SD-OCT scans were registered to each other, and the distances between the center of the optic nerve and fovea were calculated. The overlay of these SD-OCT fundus images on photographic fundus images was performed. RESULTS: Any image of the fundus could be calibrated by overlaying the SD-OCT fundus image, and the measurements were consistent with previously defined calibration methods. The mean distance between the center of the fovea and the center of the optic nerve was 4.32 +/-0.32 mm. The line from the center of the optic nerve to the foveal center had a mean declination of 7.67 +/- 3.88 degrees. Mean horizontal displacement and vertical displacement were 4.27 +/- 0.29 mm and 0.58 +/- 0.29 mm, respectively. CONCLUSIONS: The overlay of the SD-OCT fundus image provides a convenient method for calibrating any image of the fundus. This approach should provide a uniform standard when comparing images from different devices and from different reading centers.
机译：背景和目的:测量在眼底图像使用当前的软件准确的。只有通过校准眼底相机使用测量在固定视网膜地标,如视神经的尺寸,或依靠眼睛提供的校准模型阅读中心。域10月(SD-OCT)可以提供一个方便替代的校准方法眼底图像。测量精确距离SD-OCT眼底图像进行了实验,测量的距离中央窝的中心和视觉之间的关系神经。2毫米集中在中央和视神经分析了50名健康的眼睛。视网膜中央凹中心被确定使用横断面SD-OCT图片,和的中心手动视神经被确认。SD-OCT扫描相互注册,视觉的中心之间的距离神经和中央计算。这些SD-OCT眼底图像摄影眼底图像进行。底可以校准通过覆盖SD-OCT眼底图像,测量与之前定义的校准一致方法。窝和视神经的中心4.32 + / - -0.32毫米。视神经视网膜中央凹中心有一个意思7.67 + / - 3.88度的偏差。水平位移和垂直位移4.27 + / - 0.29毫米和0.58 + / - 0.29毫米,分别。SD-OCT眼底图像提供了一个方便的方法校准眼底的任何图像。方法时应提供一个统一的标准比较从不同的设备和图像不同的阅读中心。

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