Surgical Navigation Bone Model Warping Algorithm
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Solution Overview
Problem
Current surgical navigation systems require numerous points to create accurate three-dimensional bone models, making them time-consuming and cumbersome, which increases the risk of infection and reduces efficiency during surgical procedures.
Innovation Solution
A method that acquires a finite number of predefined points from a patient's bone and uses an algorithm to warp a reference bone model, generating a three-dimensional, manipulatable image that accurately represents the bone in real-time, reducing the number of points needed for accurate bone cuts and implant sizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If numerous points are acquired to create accurate three-dimensional bone models, then modeling precision is improved, but surgical time and infection risk increase
Solution Approach 1:
The patent extracts only the essential predefined points needed for accurate bone modeling from the complete surface geometry. Instead of acquiring all surface points, the system identifies and uses only the critical predefined points that define bone anatomy, thereby reducing data acquisition time while maintaining sufficient modeling accuracy for surgical navigation.
Solution Approach 2:
The patent applies partial action by acquiring fewer than the maximum possible points. The system determines that a subset of predefined points is sufficient to create an accurate enough bone model for surgical navigation, avoiding the excessive action of collecting all surface points which would maximize accuracy but unnecessarily extend surgical time.
2Measurement precision
If numerous points are acquired for bone modeling, then model accuracy is improved, but ease of operation deteriorates
Solution Approach 1:
The system extracts only the necessary predefined points from the complete bone surface, eliminating the need to manually acquire excessive points. This extraction approach maintains adequate model accuracy while significantly simplifying the surgical workflow and reducing procedural complexity.
Solution Approach 2:
The predefined points are predetermined and pre-programmed into the navigation system before surgery begins. This preliminary preparation allows the surgeon to simply follow the system's guidance to acquire points in the correct sequence and location, making the procedure easier to perform without sacrificing modeling accuracy.
3Loss of information
If numerous points are acquired, then complete bone surface representation is improved, but productivity decreases
Solution Approach 1:
The patent extracts the essential geometric information from the complete bone surface by identifying only the predefined points that capture the necessary anatomical features. This extraction provides sufficient bone surface representation for surgical navigation while dramatically improving surgical efficiency by reducing the number of points that must be acquired.
Solution Approach 2:
The system applies local quality by concentrating measurement efforts only at the predefined locations that are critical for bone modeling, rather than uniformly sampling the entire bone surface. This approach ensures adequate representation of bone geometry where it matters most for surgical planning while improving overall productivity.
Data Source
AI summary
A modeling method for use in surgical navigation is provided. The method acquires a finite number of pre-defined points from a patient's bone and registers the points with a surgical navigation system. The navigation system generates and displays a three-dimensional image of a warped bone model that is manipulatable and accurate in at least the locations of the points taken and can be used to calculate the locations of bone cuts, implant positions and sizes, as well as display all of this information on the three-dimensional warped model.