Vascular Pressure Difference Correction via Side Branch Area Ratio
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Solution Overview
Problem
Existing methods for calculating blood vessel pressure difference in bifurcation lesions of coronary arteries lack an effective correction mechanism, leading to estimation errors and reduced accuracy in geometric parameter calculations.
Innovation Solution
A method and apparatus that utilize OCT or IVUS image data to extract contour lines from blood vessel cross sections, fit intersection lines into an intersection plane, and calculate the area of a cutting plane to correct the blood vessel pressure difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blood vessel pressure difference is calculated using existing methods based on geometric parameters, then calculation can be performed, but estimation errors occur and accuracy is reduced
Solution Approach 1:
The patent introduces a correction factor based on the side branch area ratio to modify the calculated pressure difference. By changing the parameters used in the calculation (adding the correction term), the accuracy is improved while maintaining the original calculation framework
Solution Approach 2:
The patent uses the calculated side branch area ratio as feedback to adjust and correct the pressure difference calculation. This feedback mechanism allows the system to self-correct estimation errors by incorporating geometric information about the side branch into the pressure difference computation
2Measurement precision
If geometric parameters of side branch are measured, then pressure difference calculation is enabled, but measurement accuracy is insufficient without correction
Solution Approach 1:
The patent performs preliminary measurement and calculation of the side branch area and its ratio to the main branch area before the final pressure difference calculation. This preliminary action captures geometric information that would otherwise be lost, enabling subsequent correction of the pressure difference value
Solution Approach 2:
The side branch area ratio serves as an intermediary parameter that connects the geometric measurements to the pressure difference calculation. This intermediary preserves and transmits the geometric information through the calculation process, enabling accurate correction
Data Source
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AI summary
A blood vessel pressure difference correction method includes: obtaining a plurality of blood vessel cross sections between a first end point and a second end point along a main axis of a first blood vessel by taking a proximal demarcation point of the first blood vessel and a second blood vessel as the second end point, and taking a carina as the first end point; forming contour lines by the blood vessel cross sections on a first blood vessel wall and a second blood vessel wall; enclosing, by the contour lines formed by the blood vessel cross sections on the first blood vessel wall, a plurality of first blood convex surfaces; enclosing, by the contour lines formed by the blood vessel cross sections on the second blood vessel wall, a plurality of second blood vessel convex surfaces; intersecting, by the first blood convex surfaces and the second blood vessel convex surfaces, to form a plurality of intersection lines; fitting the plurality of intersection lines into an intersection plane; calculating an area of a cutting plane according to the intersection plane, where the cutting plane is a second blood vessel cross section perpendicular to a centerline of the second blood vessel cross the carina; and correcting a blood vessel pressure difference by using the area of the cutting plane.