Dynamic Reference Deviation Detection for Surgical Navigation
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Solution Overview
Problem
Conventional deviation detecting methods and systems require numerous reflective balls, leading to increased complexity, cost, and delayed real-time detection of dynamic reference frame deviations during surgical procedures, which hampers the accuracy and reliability of navigation.
Innovation Solution
A dynamic reference deviation detecting method and system that utilizes an optical tracker and processor to continuously monitor the coordinates of optical sensing elements, calculating differences between initial and instantaneous coordinates to determine deviations in the dynamic reference coordinate system, thereby simplifying the structure and enhancing real-time detection capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional deviation detecting methods use two sets of multiple reflective balls to detect relative positions, then the detection coverage is comprehensive, but the system complexity and number of calculations increase significantly
Solution Approach 1:
The patent extracts only the essential elements needed for deviation detection. Instead of using two sets of multiple reflective balls, it uses a single dynamic reference frame with minimal reflective markers. This extraction principle reduces system complexity while maintaining detection capability by removing redundant components.
Solution Approach 2:
The patent segments the detection system into a dynamic reference frame attached to the patient's body and a separate tracking system. This segmentation allows the reference frame to move with the patient while the tracker remains stationary, simplifying the overall system architecture and reducing computational requirements.
2Measurement precision
If conventional systems use multiple reflective balls to ensure accurate detection, then the measurement accuracy is maintained, but the detection timeliness decreases
Solution Approach 1:
The patent establishes a dynamic reference frame on the patient's body before the surgical procedure begins. This preliminary action ensures that the reference frame is already in place and tracked, allowing for immediate real-time deviation detection without requiring multiple reflective balls to be tracked simultaneously, thus improving detection timeliness while maintaining accuracy.
3Loss of information
If conventional deviation detecting systems use numerous reflective balls, then the coordinate detection is comprehensive, but the cost and structural complexity increase
Solution Approach 1:
The dynamic reference frame serves multiple functions simultaneously: it provides a coordinate system for tracking, attaches multiple anatomical landmarks in a single structure, and enables real-time deviation detection. This multi-functionality reduces the need for numerous separate reflective balls while maintaining comprehensive coordinate detection capability.
4Reliability
If conventional methods require many reflective balls for accurate tracking, then the navigation reliability is improved, but the ease of operation decreases
Solution Approach 1:
The patent merges multiple anatomical landmarks and reference points into a single dynamic reference frame structure. This consolidation maintains navigation reliability by tracking all necessary points simultaneously while greatly simplifying the setup process, as the entire reference frame can be attached as one unit rather than requiring precise placement of multiple separate reflective balls.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system enables instantaneous determination of dynamic reference coordinate system deviations, improving navigation reliability and accuracy by reducing complexity and the need for multiple reflective balls, allowing for timely adjustments during surgical procedures.
Implementation Method 1
conventional deviation detecting method and system thereof utilize two sets of multiple reflective balls respectively disposed on two objects to detect relative positions and coordinate via an optical tracker
Data Source
AI summary
A dynamic reference deviation detecting method is used for detecting a deviation of a dynamic reference coordinate system. A coordinate detecting step is for detecting and recording a first initial coordinate and a second initial coordinate. A first coordinate variation calculating step is for calculating a difference between a first instantaneous coordinate and the first initial coordinate to obtain a first difference value. A second coordinate variation calculating step is for calculating a difference between a second instantaneous coordinate and the second initial coordinate to obtain a second difference value. A relative coordinate variation calculating step is for obtaining a relative difference value. A dynamic reference deviation determining step is for determining whether or not the dynamic reference coordinate system is deviated according to the first difference value, the second difference value and the relative difference value.