Double judgment method of coronary stenosis based on section deformation geometric information
A technology of geometric information and judgment method, which is applied in the field of coronary stenosis detection, and can solve problems such as radius parameter deviation, center point offset, and stenosis judgment standard
Active Publication Date: 2022-03-15
BEIJING NORMAL UNIVERSITY
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[0003] The detection method based on the cross-sectional area of the blood vessel takes the change information of the cross-sectional area of the blood vessel as the criterion of stenosis, calculates the area of the interpolated cross-section, and finds out the blood vessel segment whose area is significantly smaller than that of the adjacent part. Affected by the bending shape of the blood vessel, this type of method Some errors are unavoidable when projecting and interpolating sections
[0004] The detection method based on the vascular radius is to determine the stenosis according to the change of the radius of each vascular section in the direction of the vascular centerline. The length of the line connecting the closest point or the farthest point is taken as the radius of the blood vessel. However, in the place where the blood vessel is stenotic, especially where the stenosis is severe, the actual center point will be offset, and the obtained radius parameter will be biased.
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Embodiment 1
[0036] Such as figure 1 As shown, a method for dual determination of coronary stenosis based on cross-sectional deformation geometric information includes the following steps:
[0037] Step 1: coronary reconstruction;
[0038] Step 1.1: Calculate the tangent line at the centerline point of the blood vessel. For each point on the centerline, perform principal component analysis on its adjacent points, and calculate the direction of travel of the blood vessel at this point. In the three-dimensional coordinate system, select x, The centerline points on the y and z axes that are within 2 voxel units of the point are the nearest neighbor points, that is:
[0039]
[0040] Among them, O 3 is a three-dimensional coordinate space, p is a point on the center line, and p i is the nearest neighbor point, (x p ,y p ,z p ) as the center point in the three-dimensional coordinate space O 3 Coordinates in (x pi ,ypi ,z pi ) is the coordinate value of the neighbor point, abs repres...
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The invention discloses a method for double determination of coronary artery stenosis based on cross-sectional deformation geometric information, comprising the following steps: Step 1: Coronary artery reconstruction; Step 1.1: Calculating the tangent line at the centerline point of the blood vessel; In the coronary CT angiography image, the cross-sectional profile of the blood vessel is collected with the direction of the blood vessel as the normal line; Step 2: Judgment of coronary stenosis; Step 2.1: First judgment, detection of suspicious stenosis section; Step 2.2: Second judgment, The grade of stenosis of the blood vessel segment is judged, and the detection data on the whole blood vessel is comprehensively analyzed. The coronary stenosis dual judgment method based on cross-sectional deformation geometric information in the present invention fully considers the geometric shape information of the blood vessel such as the position of the center line point, the stenosis position of the blood vessel cross-section, the concavity and convexity of the blood vessel cross-section, and the degree of concavity and convexity, etc., and accurately diagnoses the vascular stenosis. Judgment, effectively overcome the defects of traditional algorithms.
Description
technical field [0001] The invention relates to the technical field of coronary artery stenosis detection, in particular to a method for dual determination of coronary artery stenosis based on section deformation geometric information. Background technique [0002] Cardiovascular disease is known as the "No. 1 killer of human health", and the mortality rate of the disease remains high all year round. The cause of most cardiovascular diseases is the stenosis or blockage of the coronary arteries. How to detect the stenosis of the coronary arteries is The focus of attention of doctors and researchers, the current methods for detecting vascular stenosis mainly include the detection method based on the cross-sectional area of the blood vessel and the detection method based on the radius of the blood vessel. [0003] The detection method based on the cross-sectional area of the blood vessel takes the change information of the cross-sectional area of the blood vessel as the c...
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IPC IPC(8): G06T7/00G06T11/00
CPCG06T7/0012G06T11/006G06T2207/10081G06T2207/30101G06T2207/30048G06T2211/416
Inventor 田沄周晓晨赵世凤
Owner BEIJING NORMAL UNIVERSITY