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A Blood Vessel Segmentation Method Based on Optical Coherence Tomography System

An optical coherence tomography and imaging system technology, which is applied in the field of blood vessel segmentation based on the optical coherence tomography system, can solve problems such as signal attenuation, difficulty in extracting blood vessel boundaries, and unclear boundaries at the lower end of blood vessels, and achieve high accuracy. Effect

Active Publication Date: 2021-04-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, in the spectral domain Doppler OCT system, due to the absorption and dispersion of the light signal by the blood vessel, the intensity image gradually attenuates from top to bottom, and the lower boundary of the blood vessel is unclear.
In addition, due to the existence of system noise, the intensity image also has a lot of background noise interference
Therefore, it is difficult for general segmentation algorithms to extract the boundaries of blood vessels

Method used

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  • A Blood Vessel Segmentation Method Based on Optical Coherence Tomography System
  • A Blood Vessel Segmentation Method Based on Optical Coherence Tomography System
  • A Blood Vessel Segmentation Method Based on Optical Coherence Tomography System

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Embodiment Construction

[0036] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0037] The present invention provides a blood vessel segmentation method based on an optical coherence tomography system; the main idea of ​​the present invention is:

[0038] In the present invention, the intensity image and the phase image are respectively segmented. For the intensity image: considering the influence of noise in the system on the segmentation, the present invention first uses the noise method of the cosine transform dictionary to perform simple noise reduction processing on the intensity image; then, On the basis of the image after noise reduction, the method of random walk is used to estimate the image after noise reduction, and a confidence map that can reflect the distribution of vascular tissue is obtained. The interference of noise can be avoided, so the obtained confidence map is used as the segmentation object for segmentation pro...

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Abstract

The invention discloses a blood vessel segmentation method based on an optical coherence layer imaging system. According to the imaging of the optical coherence layer, firstly, an intensity image is processed twice by adopting a random walk algorithm to obtain a blood vessel boundary and a binary image. Then the binary image is mapped into a phase image to obtain a new phase image. The random walkalgorithm is adopted for the new phase image again, and then the boundary of a fluid area is obtained. Then, the image with the fluid area boundary is compared with the image with the blood vessel boundary, and then whether the detected blood vessel area has plaques or not can be judged. The method enjoys higher accuracy. When a random walk algorithm is adopted every time, two types of seed points are selected for processing, the problem that a boundary area at the bottom end of a blood vessel is difficult to segment due to the fact that an imaging system of an optical coherence layer is notenough in imaging depth is well solved, and segmentation effect of an image weak boundary is achieved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a blood vessel segmentation method based on an optical coherence tomography system. Background technique [0002] In vascular anastomosis, the assessment of vascular health status is an important process to judge the success of an operation. Optical coherence tomography (OCT, optical coherencetomography) is widely used in biological tissue imaging due to its high resolution and real-time imaging. However, most current optical coherence tomography systems for imaging blood vessels are endoscopic, and the object of imaging is arteries in cardiovascular diseases, while the object of the present invention is blood vessels in vascular anastomosis. Due to the need to image the blood vessels after surgery, there will be many sutures around the blood vessels after surgery, which makes the endoscopic OCT system unusable, so the present invention uses an in vitro Doppler OCT syst...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/11
CPCG06T2207/30101G06T7/11
Inventor 黄勇夏绍燕谭小地
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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