Standard Blood Vessel Modeling for Shape Deviation Evaluation
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Solution Overview
Problem
Existing quantitative analysis apparatuses for blood vessel images cannot specify the degree of deviation of a blood vessel shape from a healthy person's shape and lack a reference for personal variations in vessel shape.
Innovation Solution
A standard blood vessel generation device and method that specifies a blood vessel region, derives feature lines, identifies branch points, disposes division points, and calculates standard diameters to generate a virtual blood vessel as a reference, using statistical coordinates and diameters for accurate evaluation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a quantitative analysis apparatus for blood vessel images is used, then blood vessel images of objects can be specified, but the degree of deviation of blood vessel shape from a healthy shape cannot be specified due to lack of reference
Solution Approach 1:
The patent creates a standard blood vessel model by copying and aggregating feature lines from multiple healthy subjects. The feature line derivation unit extracts characteristic lines from blood vessel images, and the standard blood vessel generation unit synthesizes these into a standardized reference model that represents normal blood vessel anatomy, enabling quantitative comparison against this copy-based standard
Solution Approach 2:
The standard blood vessel model serves multiple functions: it acts as a reference for evaluating blood vessel shape deviations, enables quantitative analysis of disease states, and provides a universal standard that can be applied across different subjects and imaging modalities, replacing the need for subject-specific references
2Adaptability or versatility
If personal differences in blood vessel shape are acknowledged, then individual variations can be recognized, but accurate evaluation of deviation from healthy shape becomes difficult
Solution Approach 1:
The patent segments the blood vessel into multiple feature lines and characteristic points along its path. By dividing the complex three-dimensional vessel structure into discrete measurable segments (feature lines connecting characteristic points), the system can compare each segment against the standard model independently, allowing accurate deviation evaluation while accommodating individual variations in overall vessel morphology
Solution Approach 2:
The patent applies local quality analysis by evaluating specific local features (feature lines, characteristic points, branch points) against the standard model rather than requiring perfect global match. This allows the system to recognize individual variations in non-critical areas while maintaining precise measurement of deviations in critical regions, balancing adaptability to individual differences with measurement precision
Data Source
AI summary
A standard blood vessel generation device specifies, for each subject, a blood vessel region in which a blood vessel is depicted in an image, derives a feature line that connects feature points included in a plurality of figures included in the blood vessel region and that is along the blood vessel region, specifies a branch point on the feature line, disposes division points for line division on a line with a start point being one of two adjacent branch points and an end point being the other branch point, executes, for each set of division points having the same order counted from the start point in a plurality of the subjects, a process of calculating a statistic amount of coordinates for the set of the division points and setting a point whose coordinates are equal to the statistic amount as a standard point, and a process of setting a dimension of a predetermined site in the figure including the standard point and included in the blood vessel region as a standard diameter, and generates a standard blood vessel that is a blood vessel whose diameter at the standard point is the standard diameter and that is along a standard line connecting a plurality of the standard points.