Electroanatomical Cavity Mapping With Locked Voxels
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Solution Overview
Problem
The inefficiency in remapping a chamber during medical procedures due to the need to repeat shaving of voxels and intermediate map changes, which increases procedure time and reduces efficiency.
Innovation Solution
Marking and locking voxels that were initially shaved, along with those in proximity, to prevent their reacquisition during subsequent mapping, thereby eliminating the need for repeated shaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If voxels are shaved during initial mapping to correct surface errors, then mapping precision is improved, but during remapping the same voxels must be reacquired and re-shaved, increasing procedure time and reducing productivity
Solution Approach 1:
The patent applies preliminary action by marking and locking voxels during the initial mapping procedure before remapping occurs. Specifically, when a voxel is shaved during initial mapping, it is marked with a flag and locked in the data structure, preventing reacquisition during remapping. This preliminary marking action eliminates the need to repeat the shaving process during remapping, thus maintaining mapping precision while improving procedure efficiency.
2Measurement precision
If shaved voxels are reacquired during remapping to ensure completeness, then measurement precision is improved, but the need to repeat shaving increases procedure time and reduces productivity
Solution Approach 1:
The patent applies local quality by differentiating the treatment of voxels based on their location and acquisition status. Voxels that were previously shaved are marked with a specific quality flag (e.g., 'shaved' status) in the data structure. During remapping, the system checks this local quality marker and skips reacquisition for marked voxels, while still acquiring unmarked voxels. This localized differentiation ensures surface mapping accuracy for unacquired regions while avoiding redundant acquisition and processing of already-shaved regions, thereby reducing procedure time.
3Reliability
If intermediate map changes are performed during remapping to accommodate shaved voxels, then mapping reliability is improved, but the number of map changes increases device complexity and reduces ease of operation
Solution Approach 1:
The patent applies the extraction principle by removing the problematic shaved voxels from the remapping process through pre-marking and locking. By extracting these voxels from the acquisition set before remapping begins, the system eliminates the need for intermediate map changes that would otherwise be required to accommodate shaved voxels. The locked voxels are simply excluded from the remapping data structure, maintaining mapping reliability while significantly reducing map management complexity and improving ease of operation.
4Measurement precision
If multiple map changes are performed during remapping to handle shaved voxels, then mapping completeness is improved, but procedure time increases and productivity decreases
Solution Approach 1:
The patent applies preliminary action by pre-processing the voxel data structure during initial mapping to identify and mark all voxels that will require shaving. These voxels are locked with acquisition flags before the remapping procedure begins. During remapping, the system simply skips these pre-marked voxels, ensuring mapping completeness for unacquired regions while avoiding redundant acquisition and processing. This preliminary preparation eliminates multiple intermediate map changes, maintaining completeness while dramatically improving remapping efficiency and productivity.
Data Source
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AI summary
A method, consisting of acquiring data representative of a volume of a cavity of an organ, presenting on a display an electroanatomical (EA) map of a surface, generated in response to the data, enclosing the volume, and receiving input from a user, the input including a selected section of the EA map. The method includes, in response to the user input, locking a portion of the volume to subsequent updates of the data when updating the EA map, the portion of the volume consisting of the selected section of the EA map.