Bone Model Surface Contour Generation via Optical Probe Tracking
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Solution Overview
Problem
The existing methods for digitally modeling bone models for surgical simulation and digital teaching are inefficient due to the irregular shape of human bones, which makes mechanical design methods slow and inaccurate, and the use of three-dimensional laser scanners is costly.
Innovation Solution
An apparatus and method that utilize a probe with a tip capable of moving on a bone model surface, equipped with a preset number of non-collinear positioning apparatuses and a positioning tracking apparatus to acquire real-time center coordinates, allowing for three-dimensional reconstruction of the bone model surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a mechanical design method is used to model bone models, then the modeling process is simple, but the modeling efficiency is low and accuracy is poor due to irregular bone shapes
Solution Approach 1:
The patent replaces mechanical design methods with a combination of optical tracking and manual probing. The probe tip coordinates are captured through optical tracking of positioning apparatuses, substituting complex mechanical modeling with a more efficient coordinate acquisition and surface reconstruction approach that handles irregular bone shapes effectively.
Solution Approach 2:
The patent changes the fundamental parameter capture method from mechanical surface fitting to direct coordinate point acquisition. By tracking the three-dimensional coordinates of the probe tip as it moves across the bone surface and reconstructing the surface from these points, the system achieves both simplicity and high efficiency for irregular geometries.
2Manufacturing precision
If a three-dimensional laser scanner is used to scan the bone model, then the modeling accuracy is high, but the cost input is excessive for teaching or training scenarios
Solution Approach 1:
The patent replaces expensive industrial laser scanners with a cost-effective probe and optical tracking system. The probe is a simple handheld device with low-cost positioning apparatuses, while the optical tracking system uses affordable cameras and markers. This substitution maintains high modeling accuracy through precise coordinate capture while dramatically reducing equipment costs for educational and training applications.
Solution Approach 2:
The patent creates accurate digital copies of bone surfaces by capturing three-dimensional coordinates of the probe tip as it traces the bone surface. These coordinate points are then used to reconstruct the surface geometry, producing a digital model that accurately replicates the original bone shape without requiring expensive scanning hardware.
3Ease of manufacture
If manual probing with coordinate capture is used, then the cost is reduced, but real-time tracking accuracy depends on the positioning system precision
Solution Approach 1:
The patent introduces positioning apparatuses (such as retroreflective markers or fiducial markers) as intermediaries between the probe and the optical tracking system. These markers enable the cameras to accurately track the probe tip position and orientation in real-time, ensuring high measurement precision while maintaining the cost-effectiveness of the optical tracking approach compared to laser scanners.
Data Source
AI summary
An apparatus and method for generating the surface contour of a bone model, a storage medium, and an electronic device. The method comprises: step S101, on the basis of the real-time coordinates of the center of a positioning device acquired by a positioning tracking device, acquiring the real-time coordinate of the tip of a probe moving on the surface of a bone model; and step S102, performing three-dimensional reconstruction on all the real-time coordinates of the tip, so as to obtain a three-dimensional digital model of the surface contour of the bone model.