Choroidal angiography method and device based on optical coherence tomography imaging body scanning

Abstract

The invention relates to the field of biomedical image processing, in particular to a choroidal angiography method based on optical coherence tomography imaging body scanning. The method can be widelyused for screening and diagnosis of medical ophthalmic diseases. The method includes the steps of S1, acquiring original data of OCT body scanning fundus; S2, extracting retinal blood vessel shadow data and choroidal blood vessel data from the original data; S3, using the retinal blood vessel shadow data for masking the choroidal blood vessel data to obtain choroidal angiography data. According to the technical scheme above, by extracting the retinal blood vessel shadow data to mask the choroidal blood vessel data, retinal blood vessel shadows in the choroidal blood vessel data are removed, so that the influence of the retinal blood vessel shadows on the contrast and continuity of choroidal blood vessel projection images is reduced, and choroidal vessels can be completely and clearly displayed.

Description

technical field [0001] The invention relates to the field of biomedical image processing, in particular to a choroidal angiography method based on optical coherence tomography volume scanning, which can be widely used in the screening and diagnosis of medical ophthalmic diseases. Background technique [0002] The choroid plays a very important role in the blood oxygen supply and metabolism of the human eye. In addition to pathological changes in the choroid such as choroidal neovascularization, eye diseases such as pathological myopia, glaucoma, diabetic retinopathy, etc., and brain diseases such as Alzheimer's disease, stroke, etc. are closely related to many characteristics of the choroid, such as choroid Layer thickness, vascular distribution, etc. [0003] Optical coherence tomography (OCT) is a non-contact three-dimensional fundus imaging modality, which has been widely used in the screening, diagnosis and treatment of ophthalmic diseases. Unlike multispectral fundus ...

AI Technical Summary

Problems solved by technology

[0005] 1. The detection sensitivity of OCT decreases with the detection depth and the index of detection signal transmission in the tissue;

[0006] 2. Retinal vascular shadow affects the extraction and analysis of choroidal vessels;

[0007] 3. Choroidal blood flow velocity is much greater than retinal blood flow velocity, which has adverse effects on OCT and OCT angiography;

[0008] 4. The morphology of choroidal blood vessels is not as clear as that of retinal blood vessels, which is not conducive to segmentation and extraction in image processing

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