Dynamic Volumetric Map Update for Surgical Navigation
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Solution Overview
Problem
During otolaryngological shaving procedures, existing volumetric maps become inaccurate as tissue is removed, making real-time navigation and confirmation of tissue removal difficult, and post-procedural imaging is time-consuming and expensive.
Innovation Solution
A sensor is moved within the body to provide real-time updates to the volumetric map, reflecting changes in anatomy, allowing for continuous guidance and confirmation of tissue removal without the need for additional imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a volumetric map is acquired prior to the procedure using CT or MRI, then the initial anatomical mapping is accurate and complete, but the map becomes inaccurate as tissue is removed during the procedure
Solution Approach 1:
The system transitions from a static pre-procedure volumetric map to a dynamic updating system that continuously refreshes the anatomical map during tissue removal. The sensor tracks tool position and depth in real-time, and the processor dynamically updates the volumetric map to reflect current anatomy, ensuring accuracy throughout the procedure without requiring repeated imaging scans.
Solution Approach 2:
The system implements real-time feedback by continuously monitoring tool position and depth during tissue removal, comparing it against the volumetric map, and automatically updating the map to reflect actual anatomical changes. This closed-loop feedback ensures the navigation system remains accurate despite ongoing tissue removal.
2Measurement precision
If post-procedural imaging is performed to confirm tissue removal, then accurate verification is achieved, but the process is time-consuming and expensive
Solution Approach 1:
The system maintains continuous monitoring and updating of the volumetric map throughout the entire procedure, providing uninterrupted verification of tissue removal status. This eliminates the need for separate post-procedural imaging by ensuring the map remains accurate and up-to-date in real-time, allowing immediate confirmation of complete tissue removal.
Solution Approach 2:
The navigation system performs self-verification by continuously comparing real-time sensor data against the updated volumetric map, automatically confirming tissue removal status without requiring external post-procedural imaging. The system monitors its own accuracy and provides continuous feedback on procedural progress.
3Reliability
If real-time updates to the volumetric map are implemented using a sensor, then continuous navigation accuracy is maintained, but additional equipment and system complexity are required
Solution Approach 1:
The sensor serves multiple functions: it tracks tool position, measures tissue depth, and provides data for volumetric map updates. By consolidating these functions into a single sensor unit, the system reduces overall complexity compared to using separate devices for each function while maintaining high navigation reliability.
Solution Approach 2:
The sensor acts as an intermediary between the physical surgical field and the digital volumetric map, translating physical tool position and tissue characteristics into updated digital representations. This intermediary role simplifies the connection between physical surgery and digital navigation, reducing system complexity while improving reliability.
Data Source
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AI summary
A method for guiding a procedure is provided. A volumetric map of an interior portion of a body of a subject is presented, and, during the procedure, in response to movements of a sensor with respect to the portion, the presented volumetric map is updated, by changing a manner in which the presented volumetric map shows areas of the portion from which material was removed by the procedure. Other embodiments are also described.