Automated Tenting Detection and Correction in Electro-Anatomical Maps
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Solution Overview
Problem
Current catheter-based radio frequency ablation procedures for pulmonary vein isolation in atrial fibrillation suffer from tenting errors in electro-anatomical maps due to catheter impingement on tissue walls, leading to inaccurate anatomical representations.
Innovation Solution
A method and system for detecting and correcting tenting errors in electro-anatomical maps by acquiring multiple position information sets to identify changes in map surfaces, using tenting analysis volumes and visual indicators to alert users of potential tenting, allowing for manual or automatic correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Fast Anatomical Mapping (FAM) algorithm is used to generate anatomical map quickly, then mapping speed is improved, but tenting errors occur causing map accuracy to deteriorate
Solution Approach 1:
The system performs preliminary actions by acquiring multiple data sets before final map generation, including initial position information, intermediate position information, and final position information. This preliminary multi-stage data collection allows the system to detect and correct tenting errors before the final anatomical map is presented to the physician, thus maintaining both speed and accuracy.
Solution Approach 2:
The system implements feedback by comparing the initial anatomical map with updated maps generated from intermediate and final position data. When tenting errors are detected through comparison analysis, the system provides feedback to identify and correct these errors, ensuring the final map accurately represents the true anatomical structure while maintaining rapid mapping capability.
2Stability of the object's composition
If catheter impingement on tissue wall is allowed during mapping, then catheter stability is improved, but tenting artifacts are generated causing map accuracy to deteriorate
Solution Approach 1:
The system converts the harmful effect of catheter impingement into a beneficial detection opportunity. By monitoring for tenting artifacts caused by catheter wall contact, the system identifies these events and corrects the resulting map errors. The impingement that would normally create errors is instead used as a trigger for enhanced verification and correction procedures.
Solution Approach 2:
The system replaces reliance on mechanical catheter stability with computational detection and correction methods. Instead of depending solely on the catheter remaining stable during mapping, the system uses algorithmic analysis of position data from multiple time points to detect and correct tenting errors, substituting mechanical precision requirements with computational processing.
3Measurement precision
If multiple position information acquisitions are performed to detect tenting, then map accuracy is improved, but procedure time increases
Solution Approach 1:
The system applies partial action by performing multiple position acquisitions only when necessary for tenting detection. Rather than continuously acquiring data at maximum frequency throughout the entire procedure, the system strategically obtains initial, intermediate, and final position information at critical phases, achieving sufficient accuracy without excessive time expenditure.
Data Source
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AI summary
An electro-anatomical map is generated from first position information that defines an initial map surface. Second position information is acquired and used to determine an updated map surface. A difference between the initial and updated map surfaces corresponds to a change in the map. A first tenting analysis volume is determined based on at least part of the updated map surface. Third position information is acquired and used to define a second tenting analysis volume. The change in the map is identified as potentially corresponding to tenting in accordance with whether the first tenting analysis volume fails to overlap a predetermined amount with the second tenting analysis volume.