Method of establishing an enhanced three-dimensional model of intracranial angiography

A method of establishing an enhanced three-dimensional (3D) model of intracranial angiography, comprising:

• obtaining a bright-blood image group, a black-blood image group and an enhanced black-blood image group of an intracranial vascular site;
• wherein the bright-blood image group, the black-blood image group and the enhanced black-blood image group respectively comprise K number of bright-blood images, K number of black-blood images and K number of enhanced black-blood images, the K number of bright-blood images of the bright-blood image group, the K number of black-blood images of the black-blood image group and the K number of enhanced black-blood images of the enhanced black-blood image group are corresponded one by one, and K is a natural number greater than 2;
• taking each of the K number of bright-blood images and one of the K number of enhanced black-blood images corresponding thereto as an image pair to obtain K number of image pairs, and preprocessing each of the K number of image pairs to obtain a first bright-blood image and a first black-blood image of the each of the K number of image pairs, thereby obtaining K number of preprocessed image pairs;
• performing an image registration to the first bright-blood image of the each of the K number of image pairs by taking the corresponding first black-blood image as a reference through a registration method of mutual information and image pyramid based on Gaussian distribution sampling, to obtain a registered bright-blood image group comprising K number of registered bright-blood images;
• performing an elimination operation of flowing void artifact to the K number of enhanced black-blood images of the enhanced black-blood image group by using the registered bright-blood image group, to obtain an artifact-elimination enhanced black-blood image group comprising K number of target enhanced black-blood images;
• performing a subtraction operation between each of the K number of target enhanced black-blood images of the artifact-elimination enhanced black-blood image group and a corresponding one of the K number of black-blood images of the black-blood image group, to obtain K number of angiography enhanced images;
• establishing a blood 3D model by using the registered bright-blood image group;
• establishing a vascular 3D model with blood boundary expansion by using the registered bright-blood image group;
• establishing an angiography enhanced 3D model by using the K number of angiography enhanced images;
• and
• obtaining an enhanced 3D model of intracranial angiography based on the blood 3D model, the vascular 3D model and the angiography enhanced 3D model.