Coronary artery stenosis dual-judgment method based on cross section deformation geometric information

Abstract

The invention discloses a coronary artery stenosis dual-judgment method based on cross section deformation geometric information. The coronary artery stenosis dual-judgment method comprises the following steps that 1, coronary artery reconstruction is conducted; 1.1, calculating a tangent line at the central line point of the blood vessel; 1.2, reconstructing a blood vessel section: acquiring a blood vessel cross section contour taking a blood vessel advancing direction as a normal line in the three-dimensional coronary CT angiography image; 2, judging coronary artery stenosis; 2.1, first judgment is carried out, and suspicious narrow sections are detected; 2.2, second judgment is carried out, specifically, the stenosis level of the blood vessel section is judged, and comprehensive analysis is carried out on detection data on the whole blood vessel. According to the coronary artery stenosis dual judgment method based on the cross section deformation geometric information, geometric shape information of blood vessels such as the center line point position, the blood vessel cross section stenosis position, the blood vessel cross section concave-convex property and the concave-convexdegree is fully considered, the blood vessel stenosis is accurately judged, and the defects of a traditional algorithm are effectively overcome.

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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Problems solved by technology

[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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