Heart 3D representation method based on NURBS
A technology for three-dimensional representation and heart surface, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as poor practicability, calculation accuracy or speed that cannot meet clinical diagnosis requirements, etc.
Inactive Publication Date: 2009-10-07
ZHEJIANG UNIV OF TECH
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[0006] In order to overcome the disadvantages that the calculation accuracy or speed of the existing heart motion analysis methods cannot meet the requirements of clinical diagnosis, and the practicability is poor, the present invention provides a NURBS-based NURBS system with high calculation accuracy, fast operation speed, and meeting the requirements of clinical diagnosis. Three-dimensional representation of the heart
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[0052] The present invention will be further described below in conjunction with the accompanying drawings.
[0053] refer to Figure 1 to Figure 5 , a three-dimensional representation method of the heart based on NURBS, comprising the following steps:
[0054] 1), data acquisition and processing:
[0055] Given a large number of cardiac medical images, obtain 3D points on the surface of the heart from these images, including:
[0056] (1.1), carry out smooth processing with image filter method, remove noise;
[0057] (1.2), adjust the sliced images into the correct order through the given index file;
[0058] (1.3), define the region of interest, and segment the target region from the original CT image by the method of gray threshold;
[0059] (1.4), obtain the gray value of the image, calculate the variation value of the gray level, and get the maximum gray value as the heart boundary;
[0060] (1.5), extract the three-dimensional point cloud of the heart;
[0061] 2...
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A NURBS-based three-dimensional representation method of the heart, comprising the following steps: 1) data acquisition and processing: given a large number of cardiac medical images, and obtaining three-dimensional points on the surface of the heart from these images; 2) obtaining the above-mentioned three-dimensional point cloud of the heart As control points, NURBS surface fitting is carried out, the formula is (1): see the right formula (1), in the above formula, pi, j (i=0,1,...,n; j=0,1, ..., m) is the control point of the surface, that is, the boundary point cloud taken from the heart, in a topological rectangular array, ωi, j is the weight factor associated with the control point; Ni, k1(u) and Nj, k2( v) are normal rational B-spline basis functions of degrees k1 and k2 respectively. The invention provides a three-dimensional heart representation method based on NURBS, which has high calculation accuracy, fast operation speed and meets the requirements of clinical diagnosis.
Description
technical field [0001] The invention relates to a three-dimensional representation method of the heart. Background technique [0002] The heart is an extremely complex comprehensive system integrating electrophysiology, dynamics, hemodynamics, nerves, and biochemical control. Modeling and simulation is an effective means to study complex biological problems. In the past few years, an in-depth understanding of the physiological significance of cardiac structure and function has developed, and numerous mathematical models have been developed in an effort to quantify the observed mechanical, electrical, and biochemical behaviors of the myocardium. However, due to the complexity of the cardiac physiopathological system, these models are developed independently of each other in general, and no one has been able to integrate the various mechanisms of the heart for research. [0003] The virtual heart research that has arisen in recent years has introduced the idea of virtual r...
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IPC IPC(8): G06T17/20G06T17/00
Inventor 陈胜勇蒋婷婷刘盛张剑华王万良
Owner ZHEJIANG UNIV OF TECH