Electrode Patch Selection for Cardiac Position Tracking
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Solution Overview
Problem
Existing impedance-based and voltage-based position tracking systems for catheters in the heart suffer from insufficient accuracy and computational complexity, leading to delays in updating position maps, especially when tracking a moving organ like the heart.
Innovation Solution
The system selects a partial subset of least-correlated electrode-patches, typically three, to estimate the position of a catheter in the heart, reducing computational complexity and improving accuracy by processing 3x3 matrices instead of larger matrices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full set of electrode-patches is used for position tracking, then measurement accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent extracts and selects only the most informative subset of electrode-patches (typically three least-correlated patches) from the full set of available patches. This extraction principle reduces computational complexity by processing a smaller matrix while maintaining position tracking accuracy through careful selection of patches that provide maximum spatial information.
2Measurement precision
If real-time position updates are performed continuously, then tracking accuracy is improved, but processing time increases
Solution Approach 1:
The patent applies partial action by processing only a selected subset of electrode-patches rather than the full set. This partial processing approach reduces computational load and processing time while maintaining sufficient tracking accuracy, enabling real-time updates without excessive processing delays.
3Measurement precision
If more electrode-patches are processed, then position estimation accuracy is improved, but hardware requirements increase
Solution Approach 1:
The patent extracts the essential minimum subset of three least-correlated electrode-patches needed for accurate position estimation. This extraction principle reduces hardware requirements by utilizing fewer patches while maintaining estimation accuracy through optimal selection of patches that provide maximum spatial information with minimal hardware resources.
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
This approach enhances position-tracking accuracy and simplifies real-time calculations, reducing delays in updating maps and potentially lowering hardware requirements, thereby improving the accuracy of electro-anatomical maps of the heart.
Implementation Method 1
impedance based cardiac position tracking systems
Data Source
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AI summary
A position tracking system includes an electrical interface and a processor. The electrical interface is configured to communicate with one or more electrodes that are coupled to a distal end of a probe inserted into a heart of a patient. The electrical interface is further configured to receive, from a plurality of electrode-patches attached to a skin of the patient, position signals that are indicative of positions of the one or more electrodes in the heart. The processor is configured to select, based on the position signals, a partial subset of the electrode-patches whose position signals are least-correlated with one another, and to estimate a position of at least one of the electrodes in the heart, based on the position signals received from the selected partial subset of the electrode-patches.