Fiducial Reference 3D Location and Orientation Determination
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Solution Overview
Problem
Current location monitoring systems for surgical procedures face challenges in accurately determining the three-dimensional location and orientation of fiducial references during medical procedures, which is crucial for precise surgical guidance and planning.
Innovation Solution
A method that involves disposing a fiducial reference to be observable by a tracker, obtaining scan data, using predetermined geometric information about location points from a database, identifying at least three location points along non-parallel lines, and determining the three-dimensional location and orientation of the fiducial reference from the scan data and geometric information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fiducial reference is used for location monitoring during surgical procedures, then surgical guidance accuracy is improved, but the complexity of the monitoring system increases
Solution Approach 1:
The patent applies preliminary action by pre-storing geometric information about the fiducial reference in a database before the surgical procedure. The system pre-processes and stores the relationship between fiducial reference features and their three-dimensional coordinates, so that during surgery, only scan data acquisition and matching are needed, without requiring complex real-time calculations or additional monitoring equipment.
Solution Approach 2:
The patent uses copying by creating a digital representation of the fiducial reference's geometric information stored in the database. This digital model serves as a reference copy that can be repeatedly used for comparison with scan data, eliminating the need for physical measurement tools or complex monitoring hardware during the procedure.
2Manufacturing precision
If scan data is obtained and processed to determine fiducial reference location, then surgical precision is improved, but the time required for processing increases
Solution Approach 1:
The system performs preliminary processing by pre-storing the geometric information and expected location patterns of the fiducial reference in the database. During the surgical procedure, the system only needs to acquire scan data and perform pattern matching against the pre-stored information, significantly reducing the time required for real-time processing while maintaining high surgical precision.
Solution Approach 2:
The patent applies partial action by focusing the scan data processing only on identifying specific location points that match the pre-stored geometric information, rather than processing the entire scan dataset. This selective approach reduces processing time while still achieving the required surgical precision.
Data Source
AI summary
A method for determining the 3D location and orientation of a fiducial reference comprises disposing the fiducial reference so as to render a part of the fiducial reference observable by a tracker; obtaining from the tracker scan data of the part of the fiducial reference that is observable by the tracker; obtaining predetermined geometric information about location points on the fiducial reference, the geometric information containing three-dimensional coordinates of the location points relative to the structure of the fiducial reference; identifying within the scan data at least three location points having coordinates in the predetermined geometric information; and determining from the scan data and the coordinates of the three identified location points in the predetermined geometric information the 3D location and orientation of the fiducial reference.