Fundus OCT imaging method and system for binocular stereo vision three-dimensional imaging

Abstract

The invention provides a fundus OCT imaging method utilizing three-dimensional imaging of binocular stereo vision and a system thereof with the purpose of solving the problem that three-dimensional correction of phase positions, spatial positions and angles of OCT signals is not precise. The method comprises following steps of: synchronously collecting a binocular stereo vision imaging system and a fundus OCT system; utilizing a self-calibration result of the binocular stereo vision imaging system and acquiring a rotation matrix ROI and a translation vector TOI between an OCT coordinate system and an coordinate system for binocular stereo vision and re-establishing three-dimensional coordinates of bifurcation points of retina surface vessels; acquiring a rotation matrix RIE and a translation vector TIE from the coordinate system for binocular stereo vision to a coordinate system of human eyes; extracting a retina B scanning image; utilizing the rotation matrix ROI and the translation vector TOI in order to achieve conversion of the B scanning image from the OCT coordinate system to the coordinate system for binocular stereo vision; utilizing the rotation matrix RIE and the translation vector TIE in order to realize conversion of the B scanning image from the coordinate system for binocular stereo vision to the coordinate system of human eyes; obtaining a three-dimensional OCT image with uniform spatial distribution by interpolation of the converted B scanning image in the coordinate system of human eyes.

Description

technical field [0001] The invention relates to a fundus OCT imaging method and system thereof, in particular to a fundus OCT imaging method and imaging system utilizing binocular stereoscopic three-dimensional imaging to realize high-resolution, high-definition, large-scale fundus OCT three-dimensional structural imaging and blood flow imaging. Background technique [0002] OCT (Optical Coherence Tomography) is another new tomographic imaging technology after X-ray, CT, Magnetic Resonance Imaging (MRI), and ultrasonic diagnostic technology. Compared with conventional medical imaging methods, it has higher sensitivity and resolution; it can realize non-destructive, non-invasive, non-ionizing radiation, micron-scale structural imaging of biological tissues, as well as polarized OCT, Doppler OCT, spectral OCT, elastic OCT and other functional imaging are used for microstructural analysis and characteristic parameter measurement of living biological tissues, and are widely used...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention integrates the binocular stereo vision three-dimensional imaging system and the fundus OCT system, utilizes the binocular stereo vision three-dimensional imaging system to track the three-dimensional movement of the eyeball, and utilizes the three-dimensional movement information of the eyeball to analyze the OCT structure image and blood Correct the flow image to eliminate the OCT image quality degradation and image distortion caused by eye movement, mechanical jitter, etc.; by solving the transformation matrix between the three-dimensional blood vessel bifurcation points on the retinal surface, the three-dimensional data blocks obtained by OCT multiple scans are realized. stitching

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