Ophthalmologic frequency-domain optical coherence tomography (OCT) system based on graphics processing unit (GPU) platform and processing method

Abstract

The invention discloses an ophthalmologic frequency-domain optical coherence tomography (OCT) system based on a graphics processing unit (GPU) platform and a processing method. The system comprises a super luminescent diode (SLD) light source, a light circulator, an optical fiber beam splitter, a first polarization controller and a reference arm which are sequentially connected with each other, wherein the light circulator or the optical fiber beam splitter is also connected with a second polarization controller, the second polarization controller is also connected with a spectrometer, a high-speed camera data line, a high-speed image acquisition card and a computer sequentially, the optical fiber beam splitter is also connected with a third polarization controller and a sampling arm which is connected with a tested eye sequentially, and the computer is respectively connected with the sampling arm, an image display unit and a GPU image processor. The method is as follows: rules are firstly set: FrameNumber represents frame number, the size of a data block to be process is FrameNumber B-scan data sizes, and each B-scan consists of batch A-scans; and a sampling data f(lambda, y) is a function of wavelength which is acquired through the spectrometer and is subjected to analog (A) / digital (D) conversion, wherein a horizontal ordinate is the wavelength lambda, and a longitudinal ordinate is the numerical value y. The system meets requirements on clinical two-dimensional (2D) real-time imaging.

Description

technical field [0001] The present invention relates to an ophthalmic OCT system. In particular, it relates to an ophthalmic frequency-domain OCT system and processing method based on a GPU platform that can solve the real-time imaging problem of an ophthalmic OCT system Background technique [0002] Optical coherence tomography (OCT) has been successfully applied in the field of ophthalmic disease diagnosis since the 1990s due to its advantages of high resolution, high sensitivity, non-contact, non-destructive real-time live imaging, etc. With rapid development, its technology has also developed from the time-domain OCT stage to the frequency-domain OCT stage; the technical field has also developed from tissue structure imaging to tissue function imaging; and the application field has also expanded from the field of ophthalmology diagnosis to cardiovascular, skin, oral cavity, and tissue engineering. and other fields. [0003] With the development of ultra-high-speed CMOS...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an ophthalmic frequency-domain OCT system and processing method based on a GPU platform that realizes a substantial improvement in instrument performance with low-cost hardware configuration and solves the real-time imaging problem of an ophthalmic OCT system

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