Signal processing method for OCT imaging system, storage medium and OCT imaging system

Abstract

The invention provides a signal processing method for an OCT imaging system. The signal processing method comprises the following steps that a high-speed swept-frequency light source module outputs afirst pulse signal to a logic control module while outputting high-frequency laser to a main optical system; high-frequency laser is divided into two beams of laser after passing through the main optical system, two beams of interference light returned according to the original path enter the high-speed balance detector detection module, and the logic control module judges and processes a first pulse signal and then outputs a third pulse signal to a high-speed acquisition integration module; and the third pulse signal is used for triggering the high-speed acquisition integrated module to perform data acquisition. The invention further relates to an OCT imaging system and a storage medium. According to the signal processing method, the starting position of each frame of image is accuratelycontrolled from hardware, the image data extracted by an upper computer is the image data which is accurately aligned through the hardware and is subjected to FFT through FPGA hardware, and data correction does not need to be carried out on the upper computer, so that the accuracy of the obtained image data is improved and the workload is reduced.

Description

technical field [0001] The invention relates to the field of OCT imaging, in particular to a signal processing method for an OCT imaging system. Background technique [0002] Optical coherence tomography (OCT) is a real-time, in vivo, high-sensitivity, high-resolution and non-invasive optical imaging method for biological tissues, with a spatial resolution of 2-10 μm and a spatial resolution of 1- With an imaging depth of 3mm, its lateral resolution and imaging depth are between ultrasound and microscopy. OCT can not only display the three-dimensional structure image of the tissue slice from the microstructure, but also display the functional information of the tissue such as absorption, scattering, and blood flow velocity. OCT is called "optical biopsy" because it can have resolution capabilities close to the level of histopathological sections. At present, OCT systems have been quite maturely applied in the field of ophthalmology, and the main applications of endoscopic ...

AI Technical Summary

Problems solved by technology

This method adopts the data post-processing method to correct the image. For the high-speed frequency scanning OCT system, there will be a large amount of image data in the whole system. Using the above method, it is necessary to search for the position marker signal of each frame, and then perform all images Correction, and then 3D reconstruction, which is quite time-consuming, and the workload is quite large

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