基于光学相干断层血管造影的眼动跟踪系统设计
Design of Eye Tracking System Based on OCTA
岑颖珊 1韩定安 2吴南寿2
作者信息
- 1. 佛山科学技术学院 机电工程与自动化学院,广东 佛山 528225
- 2. 佛山科学技术学院 物理与光电工程学院,广东 佛山 528225
- 折叠
摘要
光学相干断层血管造影技术是一种基于运动对比的血管造影方法,尽管采集速度有所提高,但是眼球运动仍然是造成伪影的主要原因.文章描述了一个基于硬件的主动眼底跟踪扫描激光检眼镜系统集成到OCTA系统的方法,在OCTA采集过程中SLO系统也同步启动,同时成像并对SLO图像引用GPU并行处理Frangi滤波和四象限角点匹配的偏移计算方法来进行实时的眼动矫正,可达到消除眼动伪影,视网膜眼底血流结构高精度成像的效果.
Abstract
Optical Coherence Tomography Angiography(OCTA)technology is a angiography method based on motion contrast.Despite improved acquisition speed,eye movement is still the main cause of artifacts.The paper describes a method for integrating an active fundus tracking Scanning Laser Ophthalmoscope(SLO)system based on hardware into the OCTA system.During the OCTA acquisition process,the SLO system is also synchronously started,and the imaging is performed,and GPU parallel processing Frangi filtering and four-quadrant corner matching offset calculation methods is used for real-time eye movement correction,which can eliminate eye movement artifacts and achieve the effect of high-precision imaging of retinal fundus blood flow structure.
关键词
OCTA/眼底跟踪/Frangi滤波/四象限角点匹配Key words
OCTA/fundus tracking/Frangi filtering/four-quadrant corner matching引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据