Method for performing fundus refractive compensation judgment and imaging optimization by using OCT signal

Abstract

The embodiment of the invention discloses a method for performing fundus refractive compensation judgment and imaging optimization by using an OCT signal. The method comprises the following steps of:S1, controlling a reference arm optical path: finding a retina structure in an image and adjusting the retina structure to a proper position in the image by calculating the concavity and convexity ofthe retina structure and an imaging position; S2, performing automatic refractive compensation: controlling the optical path difference between the reference arm optical path and a sample arm scanningbeam optical path to be a fixed value, and finding an image with the strongest signal through a hill climbing method for refractive compensation; S3, performing left-right fine adjustment on the retina structure: judging the left-right deviation of the retina structure, and controlling a Y-axis motor to perform horizontal adjustment according to the deviation; and S4, adjusting the retina imagingposition: adjusting the reference arm optical path again according to the image intensity so as to adjust the height position of the retina in the image. According to the method for performing fundusrefractive compensation judgment and imaging optimization by using the OCT signal, the cost can be reduced, rapid and accurate refractive compensation can be realized, and meanwhile, retina imaging is optimized.

Description

technical field [0001] This application relates to the technical field of retinal image imaging, in particular to a method for using OCT signals to determine fundus refraction compensation and optimize imaging. Background technique [0002] The fundus retina is a microscopic structure of the human body. Many eye diseases and some systemic diseases can be reflected on the fundus retina. Optical coherence tomography (OCT) is a fundus retinal imaging system that can acquire three-dimensional fundus images. OCT equipment uses low-coherent light interference imaging technology, and the optical path difference between the scanning probe beam and the reference beam needs to be within a certain range to be clearly imaged. In order to use OCT equipment to obtain clear fundus images, the usual OCT equipment needs to perform two steps of diopter compensation and imaging height adjustment of the scanning optical path. Refractive compensation refers to adjusting the optical path for hu...

AI Technical Summary

Problems solved by technology

However, this method requires the subject to observe the target and give feedback, and the subject needs to be trained first, and the head movement may affect the subsequent OCT measurement during the feedback process

The patent for invention CN102824159B "Fundus OCT Automatic Jumping System, Equipment and Method" discloses an automatic adjustment device that uses a microlens array and detects the distance between two adjacent points of the beam focus point detected by a detector, but This method requires additional detectors and increases hardware costs

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