A method and device for extracting vascular ridge points based on image gradient vector flow field

Abstract

This application provides a method and device for extracting vascular ridge points based on the image gradient vector flow field. The method includes: enhancing the vascular targets in the angiography image; and using the gradient vector flow field model to obtain the gradient vector of the enhanced image. Flow field; According to the gradient vector flow field of the enhanced image, calculate the cosine value of the angle between the vector at a pixel in the enhanced image and the vector at two adjacent pixels of the pixel along a coordinate axis direction. If If the cosine value meets the threshold condition, then the pixel point is the blood vessel ridge point in the coordinate axis direction. This application can effectively suppress the influence of background noise, improve the extraction efficiency of blood vessel ridge points in angiography images, increase the detection number of blood vessel target ridge points, and improve the detection accuracy of blood vessel ridge points, providing a basis for subsequent blood vessel centerline extraction and blood vessel modeling. .

Description

technical field [0001] The present application belongs to the field of medical image processing, and in particular relates to a method and device for extracting vascular ridge points based on image gradient vector flow field. Background technique [0002] With the rapid development of medical imaging technologies such as CT angiography and magnetic resonance angiography (MRA), the use of image post-processing technology to obtain vascular ridge points and centerline information is very critical for describing the morphological structure of blood vessels and realizing vascular target reconstruction. Significance, the effective solution to this problem can improve the automation level and implementation accuracy of vascular disease diagnosis, surgical planning and surgical navigation, thereby improving the efficiency of diagnosis and the success rate of surgery. [0003] In the prior art, under the standard condition that the tubular target (vessel) is high signal, the backgro...

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Problems solved by technology

[0005] This application provides a method and device for extracting vascular ridge points based on image gradient vector flow field, which is used to solve the problems in the prior art that the ridge point extraction method based on the definition of local extremum points is easily affected by high-intensity noise points, and the extracted The ridge point accuracy is not high

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