Grytz Rafael, El Hamdaoui Mustapha, Fuchs Preston A, Fazio Massimo A, McNabb Ryan P, Kuo Anthony N, Girkin Christopher A, Samuels Brian C
Department of Ophthalmology and Visual Sciences, University of Alabama at Birmingham, AL, USA.
Department of Biomedical Engineering, University of Alabama at Birmingham, AL, USA.
Biomed Opt Express. 2022 Jan 31;13(2):1070-1086. doi: 10.1364/BOE.447595. eCollection 2022 Feb 1.
We propose an empirical distortion correction approach for optical coherence tomography (OCT) devices that use a fan-scanning pattern to image the posterior eye segment. Two types of reference markers were used to empirically estimate the distortion correction approach in tree shrew eyes: retinal curvature from MRI images and implanted glass beads of known diameter. Performance was tested by correcting distorted images of the optic nerve head. In small animal eyes, our purposed method effectively reduced nonlinear distortions compared to a linear scaling method. No commercial posterior segment OCT provides anatomically correct images, which may bias the 3D interpretation of these scans. Our method can effectively reduce such bias.
我们提出了一种针对使用扇形扫描模式对眼后节进行成像的光学相干断层扫描（OCT）设备的经验性失真校正方法。使用了两种类型的参考标记来经验性地估计树鼩眼睛中的失真校正方法：来自MRI图像的视网膜曲率和已知直径的植入玻璃珠。通过校正视神经乳头的失真图像来测试性能。在小动物眼中，与线性缩放方法相比，我们提出的方法有效地减少了非线性失真。没有商用的眼后节OCT能提供解剖结构正确的图像，这可能会使这些扫描的三维解释产生偏差。我们的方法可以有效地减少这种偏差。
