AI Craniofacial Asymmetry Evaluation With 3D Coordinate Alignment
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Solution Overview
Problem
Current methods for evaluating craniofacial asymmetry are subjective and lack accuracy due to reliance on human experience or using the midpoint between ear holes, which distorts the captured plane.
Innovation Solution
An evaluation method using artificial intelligence to identify head shape, automatically mark feature points, and establish a three-dimensional coordinate system based on the center of the eyebrows, most concave point of the nose, and ear holes, allowing for objective and accurate asymmetry measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If doctors use experience to capture plane images and perform calculations, then the evaluation can be performed, but the calculation is not objective and produces different results due to subjective opinion
Solution Approach 1:
The patent replaces the manual mechanical measurement system (doctors physically capturing images and calculating) with an automated digital system using coordinate establishment and AI algorithms. This substitution eliminates human subjective judgment by using mathematical coordinate systems and automated image processing to determine asymmetry, thereby improving both objectivity and measurement precision.
Solution Approach 2:
The patent changes the evaluation parameters from subjective visual assessment to objective quantitative measurements based on coordinate geometry. By establishing a three-dimensional coordinate system and calculating asymmetric distances mathematically, the system transforms the evaluation from qualitative doctor judgment to quantitative automated calculation, resolving the contradiction between objectivity and precision.
2Ease of manufacture
If the midpoint between ear holes is used to form coordinate system, then the coordinate establishment is simple, but the craniofacial skew distorts the captured plane resulting in lack of accuracy
Solution Approach 1:
The patent transitions from two-dimensional plane imaging to three-dimensional coordinate system establishment. By adding the z-axis dimension and using multiple reference points (brow center, nose bridge, ear holes) to define a three-dimensional coordinate system, the system compensates for plane distortion caused by craniofacial skew, thereby maintaining measurement accuracy while preserving ease of coordinate establishment.
Data Source
AI summary
An evaluation method of craniofacial asymmetry index based on artificial intelligence is disclosed and includes: a craniofacial image shooting step: obtaining a craniofacial model file of a patient; an artificial intelligence head shape identification and feature point marking step: importing the craniofacial model file into an artificial intelligence algorithm, performing identification and feature point marking on a craniofacial image in the craniofacial model file to generate at least one feature point; a craniofacial space coordinate axis establishment step: including a coordinate axis y-z plane establishment step, a coordinate axis origin establishment step and a z-axis orientation definition step; and an artificial intelligence skew degree estimation step: inputting the craniofacial model file and corresponding coordinate axes into an artificial intelligence skew degree evaluation algorithm simultaneously, and presenting a craniofacial skew degree in a data visualization manner.