A blood vessel motion tracking method based on four-dimensional medical images
A technology of medical imaging and vascular motion, applied in the tracking of moving targets and the field of vascular motion tracking for four-dimensional medical imaging, can solve the problems of low signal-to-noise ratio of vascular imaging and complex changes in blood vessel shape, and achieve the effect of high process efficiency.
Active Publication Date: 2021-10-15
BEIJING UNIV OF TECH
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[0007] The present invention is oriented to the blood vessel tracking and positioning requirements in medical clinical four-dimensional images, and provides a robust blood vessel movement tracking method for the situation where the signal-to-noise ratio of blood vessel imaging in dynamic volume data is low and the shape of blood vessels is complex.
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[0042] Below in conjunction with accompanying drawing of description, the embodiment of the present invention is described in detail:
[0043] A coronary vessel movement tracking based on four-dimensional CT images. For 10 to 30 CT image samples uniformly collected in each breathing or heartbeat cycle, the overall processing flow chart is attached figure 1 As shown, the specific details are as follows Figure 4 shown.
[0044] 1 Extract blood vessels from volume images.
[0045] 1.1 Read the volumetric image data at the initial t=0 phase, take the maximum value of the vascular image intensity and the lower limit of the normal range of chest CT images at 240 as the range, and perform histogram normalization and enhancement preprocessing on the original volumetric image, so as to realize The CT intensity value of the region of interest is normalized, and the preprocessed image is denoted as I 0 ;
[0046] 1.2 Starting from a certain preset point, through the three-dimension...
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A blood vessel motion tracking method based on four-dimensional medical images belongs to the field of medical image processing. Firstly, the present invention constructs a vascular shape modeling method combining hierarchical and chain structures, which realizes the parametric characterization of vascular morphological structures in three-dimensional space; secondly, according to the complex movement of blood vessels in three-dimensional space, the The visual description model of the overall blood vessel is established from the appearance, spatial relationship and local structure, which solves the problem of the overall modeling description of the blood vessel in the volume image; finally, the present invention establishes a dynamic deduction method for the state of the blood vessel model, and provides a set of An overall solution for blood vessel positioning from 3D image vessel description to 4D image vessel motion tracking. The present invention can perform robust and accurate three-dimensional motion tracking on the blood vessel of interest segment by segment during the entire respiratory or cardiac cycle, and the tracking result does not depend on the performance of the complex three-dimensional registration operation in the traditional technology, and the overall calculation process is efficient and simple .
Description
technical field [0001] The invention belongs to the technical field of medical image processing, and relates to a tracking method of a moving target, and more specifically, relates to a four-dimensional medical image-oriented blood vessel movement tracking method. Background technique [0002] Blood vessels are the main transport channel for human life movement, and have always been the focus of attention in the medical field. Clinically, quantitative analysis and measurement of vascular movement caused by breathing and heartbeat can assist doctors in implementing precise diagnosis and treatment of diseases. For example, the coronary artery is an important pathway for myocardial blood supply. With the help of image data, its extraction and motion tracking can realize the diagnosis of cardiovascular disease and the evaluation of cardiovascular function; at the same time, it is also helpful to avoid surgical risks during cardiovascular surgery and thoracoabdominal radiotherapy...
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IPC IPC(8): G06T7/246
CPCG06T2207/10076G06T2207/30101G06T2207/30241G06T7/251
Inventor 张辉齐天卉杜康李晓光卓力
Owner BEIJING UNIV OF TECH