Retinal Blood Flow Measurement Device Based on Beam Parallel Scanning Mode

Abstract

The invention relates to the field of medical optical detection. The invention discloses a human eye retinal blood flow measurement device based on the beam parallel scanning mode, which can quantitatively detect the blood vessel branches of different parts of the human eye retina and the total blood flow of the retina, and make the detection beam Through the front focus of the human eye, the retina of the human eye is scanned parallel to the main optical axis or radial axis of the human eye; the beam parallel incident mode can effectively increase the angle between the detection beam and the retinal blood vessels, so as to realize the Quantitative detection of blood flow of blood vessel branches in different parts of the human retina, improving the accuracy of blood flow measurement results. At the same time, using a single-beam OCT system to measure the blood flow of the human eye retina reduces the complexity of the OCT retinal blood flow measurement device and greatly reduces the cost, which is conducive to promoting the popularization of retinal blood flow measurement technology in clinical medicine Applications to help the diagnosis and research of ophthalmic diseases.

Description

technical field [0001] The invention relates to the field of medical optical detection, in particular to a retinal blood flow measurement device based on a beam parallel scanning mode, which is an ophthalmic optical detection device with the function of detecting the blood flow of the retina of the human eye. Background technique [0002] Optical coherence tomography (OCT) is a non-contact, non-invasive medical optical imaging technology. By detecting the scattered light inside the sample, OCT can perform high-resolution imaging of the structure of biological samples with a resolution on the order of microns. In addition to providing information on tissue morphology, OCT can also detect Doppler frequency shifts in scattered light from biological tissue, allowing analytical measurements of blood flow within the tissue. [0003] In Doppler OCT, flowing blood produces a Doppler frequency shift (Δf) on scattered light, [0004] Δf=-(2nVcosα) / λ 0 (1) [0005] where n is the ...

AI Technical Summary

Problems solved by technology

Because this technology uses two sets of OCT systems, the cost is high, the adjustment is complicated, it is not conducive to clinical application, and it is difficult to be popularized

In addition, this technique is not perfect in theory. In the incident direction of the beam, the detection light and the blood vessel to be measured are required to be close to perpendicular, and the angle between the scanning direction and the blood vessel needs to be detected as an auxiliary parameter.

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