Hepatic vessel three-dimensional reconstruction and visualization method based on vascular tubular model

Abstract

The invention provides a hepatic vessel three-dimensional reconstruction and visualization method based on a vascular tubular model. The method comprises the steps of S10, obtaining a liver CT image,and adjusting the window width and window position, so as to enable the liver CT image to accord with the gray scale display range of display equipment; s20, performing preprocessing of denoising andimage enhancement on the liver CT image conforming to the gray level display range of the display device; s30, segmenting the blood vessel by using a segmentation method based on a Hessian matrix anda region growing algorithm according to the preprocessed blood vessel image; s40, filling a cavity caused by blood vessel segmentation by adopting a morphological method; s50, volume rendering is performed on the blood vessel by using a triangular mesh surface rendering and light projection algorithm according to inherent characteristics of the liver blood vessel so as to realize three-dimensionalreconstruction; and S60, visually displaying the three-phase image sequence by adopting a computer-aided liver blood vessel visualization system based on a CT dynamic enhanced image. According to themethod, segmentation and three-dimensional reconstruction are accurately and reliably carried out on the liver blood vessel, and visual display can be well carried out to assist a doctor in determining the liver condition.

Description

technical field [0001] The invention relates to the technical field of medical image analysis, in particular to a method for three-dimensional reconstruction and visualization of hepatic blood vessels based on a tubular model of the blood vessels. Background technique [0002] At present, the diagnosis of vascular diseases mainly relies on various angiographic techniques. With the development of interventional radiology, angiography has become an important clinical diagnostic method, especially in interventional therapy, which plays an irreplaceable role. Several different modes of angiographic imaging mainly include Bi-planeX-ray / Digital Subtraction Angiograph (DSA), Magnetic Resonance Angiography (MRA), CT Angiography (CTA), ultrasound Angiography, and an angiography technique that combines several different medical imaging modalities. Because the vascular images obtained by CT angiography are clear, they can provide a good reference for doctors' diagnosis and preoperati...

AI Technical Summary

Problems solved by technology

The traditional liver vessel segmentation requires the surgeon to manually delineate the vessel area on each liver slice. Since there are about 200 liver slices in each group, drawing blood vessels manually is not only time-consuming but also prone to errors

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