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首页> 外文期刊>Journal of vitreoretinal diseases. >Does Projection Artifact Removal Improve Visualization of Images in Optical Coherence Tomography Angiography?
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Does Projection Artifact Removal Improve Visualization of Images in Optical Coherence Tomography Angiography?

机译：投影工件去除改善吗在光学相干的可视化图像断层造影吗?

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Purpose: This study assesses the frequency of projection artifacts in optical coherence tomography angiography (OCTA) en face images and compares images before and after applying a 3-dimensional projection artifact removal (3D-PAR) algorithm. Methods: This is a single-center, retrospective study that included consecutive patients with any underlying diagnosis who had OCTA obtained from January to March 2017. Patients with various retinal diseases and also healthy eyes were included. All participants underwent imaging with a scan area of 3 mm × 3 mm. The 4 default en face slabs were analyzed: superficial capillary plexus (SCP), deep capillary plexus (DCP), outer retina (OR), and choriocapillaris (CC). Images were qualitatively analyzed before and after 3D-PAR by 2 independent graders. Results: None of the SCP images had projection artifact before or after 3D-PAR. Scans of the DCP presented projection artifact in 96.5% of the cases. After 3D-PAR, 14.7% had a complete improvement of projection artifact, 56.5% had a partial improvement, 14.1% were worse, and 14.7% presented no change. In the OR, 2.9% had projection artifact, with a complete improvement after 3D-PAR in 40%, partial improvement in 20%, and no change in 40%. Projection artifact was initially present in 97.6% of the images in the CC. After 3D-PAR, there was a complete improvement in 72.9%, partial improvement in 26.5%, and no change in 0.6%. Choroidal neovascularization (CNV) was detected in 29 eyes (17.1%), and 3D-PAR improved detection of CNV in 12 cases (41.4%). Conclusions: OCTA with 3D-PAR technology minimizes the appearance of projection artifacts in the DCP and CC slabs.
机译：目的:本研究评估的频率投影光学相干的工件断层扫描血管造影(八面体)在图像和脸应用前后对比图片三维投影工件去除(3 d-par)算法。单中心回顾性研究,包括在内连续的任何潜在的患者从1月到八面体获得诊断2017年3月。包括疾病和健康的眼睛。参与者进行了成像扫描区域3毫米×3毫米。分析:表面的毛细血管丛(SCP),深毛细血管丛(DCP),外层视网膜(或),和choriocapillaris (CC)。3 d-par前后作定性分析2年级学生独立。图像投影工件之前或之后3 d-par。在96.5%的情况下工件。14.7%的人一个完整的改进投影工件,56.5%有部分改善,14.1%更糟糕的是,和14.7%没有变化。或者,2.9%的人预测工件,完成改进后3 d-par 40%,部分40%提高20%,没有变化。最初出现在投影工件图像在CC的97.6%。3 d-par之后,有一个完整的改善72.9%,部分改善26.5%,没有变化0.6%。检测到29眼(17.1%),3 d-par改善CNV的检测12例(41.4%)。结论:与3 d-par技术八面体最小化投影工件的外观DCP和CC板。

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