Minification of fundus optical coherence tomographic images in gas-filled eye.
Minification of fundus optical coherence tomographic images in gas-filled eye.
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DOI：
10.1186/s12886-016-0306-1
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发表时间：
2016-07-26
影响因子：
2
通讯作者：
Sakamoto T
中科院分区：
文献类型：
--
作者：
Yamashita T;Terasaki H;Sakamoto T
光学相干断层扫描（OCT）被越来越多地用于评估和管理各种视网膜疾病，但不太了解如何缩小OCT图像中充满气体的眼睛。本研究的目的是调查气体填充的眼睛上的OCT图像的大小的影响。这是一项回顾性病例系列，包括2012年4月至2014年9月期间接受黄斑裂孔手术的79例患者的81只连续眼睛。在手术后2天，在充满气体的人工晶状体眼中以及在手术后1个月，从同一只眼睛但充满液体的情况下，用光谱域OCT仪器拍摄视盘图像。在OCT图像上测量视盘的垂直长度、水平宽度和面积。49例（50只眼）患者（平均年龄66.4 ± 5.9岁）获得清晰图像。充盈组视盘垂直长度和水平宽度分别为1213.8 ± 170.5和1650.6 ± 195.9 μm（P < 0.01），水平长度分别为1169.4 ± 143.1和1526.4 ± 219.9 μm（P < 0.01）。视盘面积：气体眼为1.12 ± 0.34mm ~ 2，液体眼为1.88 ± 0.37mm ~ 2，两者相差40.4%。充气眼的眼底图像明显小于液体眼。在分析从充满气体的眼睛获得的图像时，应考虑OCT图像的缩小。试验注册号：UMIN 000007517。登记日期：2012年3月21日。本文的在线版本（doi：10.1186/s12886-016-0306-1）包含补充材料，可供授权用户使用。
Optical coherence tomography (OCT) is being used increasingly to evaluate and manage a variety of retinal diseases, but not much is known about the minification of the OCT images in gas-filled eyes. The purpose of this study was to investigate the effect of gas-filled eyes on the size of the OCT images. This was retrospective case series of 81 consecutive eyes of 79 patients who had macular hole surgery between April 2012 and September 2014. Images of the optic disc were taken with a spectral domain-OCT instrument 2 days after surgery in gas-filled, pseudophakic eyes and from the same eyes but fluid-filled one month after the surgery. The vertical length, horizontal width, and the area of the optic disc were measured in the OCT images. Clear images were obtained from 50 eyes of 49 patients (mean age 66.4 ± 5.9 years). The mean vertical length and mean horizontal width of the optic disc in the gas-filled eyes were about 25 % shorter than that of fluid-filled eyes (vertical, 1213.8 ± 170.5 and 1650.6 ± 195.9 μm, P < 0.01; horizontal, 1169.4 ± 143.1 and 1526.4 ± 219.9 μm, P < 0.01). The mean area of the optic disc was 1.12 ± 0.34 mm2 in gas-filled eyes which was significantly smaller than that in fluid-filled eyes (1.88 ± 0.37 mm2) by 40.4 %. The fundus images of gas-filled eyes are significantly smaller than that in the same fluid-filled eyes. The minification of the OCT images should be considered when analyzing images obtained from gas-filled eyes. Trial registration number: UMIN000007517. Date of registration: 3/21/2012. The online version of this article (doi:10.1186/s12886-016-0306-1) contains supplementary material, which is available to authorized users.