Optical Shape Sensing Catheter for 3D Anatomical Mapping
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Solution Overview
Problem
Current medical imaging technologies for complex ablation procedures, such as atrial fibrillation ablation, lack the ability to effectively interrogate tissue depth for assessing lesion transmurality, limiting feedback on lesion formation and accuracy in anatomical mapping.
Innovation Solution
Integration of an optical shape sensing system into ablation devices, utilizing Fiber Bragg Gratings or Rayleigh scattering, to track the shape of catheters or scopes within the body, enabling the creation of detailed 3D volumetric maps and facilitating registration and segmentation of pre and intra-operative datasets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional electroanatomic mapping systems are used for ablation procedures, then the mapping of anatomical structures can be achieved, but the ability to interrogate tissue depth and assess lesion transmurality is insufficient
Solution Approach 1:
The patent introduces an optical shape sensing system as an intermediary technology to indirectly measure tissue depth and lesion transmurality. The shape sensing catheter uses optical fibers with Bragg gratings to detect mechanical deformations and contact forces, which serve as mediators to infer tissue penetration depth without directly measuring it, thus resolving the contradiction between achieving anatomical mapping and obtaining tissue depth information
2Ease of operation
If optical endoscopic imaging is used during ablation, then visual feedback on superficial tissue changes is provided, but the ability to assess lesion depth and transmurality is lost
Solution Approach 1:
The patent merges optical endoscopic imaging capabilities with optical shape sensing technology into a single integrated catheter system. The endoscopic camera provides visual feedback on superficial tissue changes while the co-located shape sensing fibers simultaneously measure mechanical deformations for depth assessment, combining the advantages of both technologies to resolve the contradiction between visual feedback and depth measurement precision
3Measurement precision
If dense point cloud sampling is performed for anatomy delineation, then mapping accuracy is improved, but the time required for data acquisition and processing increases
Solution Approach 1:
The patent performs preliminary action by pre-processing and filtering the dense point cloud data during the mapping acquisition phase. The system pre-establishes the spatial relationships and anatomical landmarks, allowing for faster subsequent processing and registration. This preliminary organization of data reduces the time burden of handling dense point clouds while maintaining mapping accuracy
4Measurement precision
If complex registration procedures are used to align pre-operative and intra-procedural data, then registration accuracy can be achieved, but the procedure complexity and time increase
Solution Approach 1:
The patent creates a real-time 3D copy of the anatomical structure using the shape sensing catheter's spatial measurements. This dynamic digital copy automatically aligns with pre-operative imaging data through coordinate transformation, eliminating the need for complex manual registration procedures. The copied spatial information from the shape sensing system serves as a direct reference for aligning datasets, simplifying the registration process while maintaining accuracy
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
Provides better feedback on lesion location and quality, enables faster and more accurate anatomical mapping, and simplifies the registration of pre-operative data with real-time intra-procedural imaging, enhancing the precision of ablation procedures.
Implementation Method 1
utilizing Fiber Bragg Gratings or Rayleigh scattering, to track the shape of catheters or scopes within the body
Implementation Method 2
utilizing Fiber Bragg Gratings or Rayleigh scattering, to track the shape of catheters or scopes within the body
Data Source
AI summary
A system and method for mapping interluminal structures includes an elongated flexible instrument (102). An optical shape sensing device (152, 154) is disposed within the flexible instrument and is configured to determine a shape of the flexible instrument relative to a reference. The shape sensing device is configured to collect information based on its configuration to map an interluminal structure during a procedure. An imaging enabled ablation device (117) is mounted at or near a distal end portion of the flexible instrument.