Surgical Navigation Tracking with Spread Spectrum Distortion Correction
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Solution Overview
Problem
Surgical procedures in areas obscured by opaque tissues pose challenges due to limited visual access, necessitating precise tracking and navigation of instruments within the subject.
Innovation Solution
A navigation system utilizing a spread spectrum technique to transmit signals between tracking devices and arrays, incorporating electromagnetic and optical tracking systems, with distortion detection and correction to accurately determine the pose of instruments relative to the subject.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic or optical tracking systems are used to determine instrument pose, then navigation capability is improved, but signal distortion from opaque tissues and surgical equipment reduces measurement precision
Solution Approach 1:
The system continuously monitors signal characteristics and detects distortion in real-time, then adjusts tracking parameters and corrects pose calculations based on the detected distortion, creating a closed-loop feedback system that compensates for harmful effects
Solution Approach 2:
The patent introduces intermediary reference markers and calibration objects that mediate between the tracking system and the instrument, allowing the system to distinguish between actual instrument position and signal distortion artifacts
2Adaptability or versatility
If multiple tracking devices and arrays are deployed to enhance navigation capability, then system versatility is improved, but device complexity increases
Solution Approach 1:
The tracking devices and arrays are designed to perform multiple functions: primary position tracking, distortion detection, calibration, and verification, allowing a single system component to serve several purposes and reducing overall system complexity
Solution Approach 2:
The patent combines distortion detection capabilities with the primary tracking function by integrating detection algorithms into the existing tracking pipeline and using the same hardware infrastructure for both tracking and distortion monitoring
Data Source
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AI summary
Disclosed is a method of operating a navigation system, comprising: generating a spread spectrum signal; transmitting the generated spread spectrum signal as a tracking signal; receiving the tracking signal; demultiplexing and equalizing the received tracking signal; and recovering the impulse response from the demultiplexed and equalized tracking signal as an impulse; wherein a pose of a tracking device is operable to be determined with the impulse recovered from the received tracking signal.