Respiratory-Gated Point Cloud Navigation for Precise Tissue Access
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Solution Overview
Problem
Existing medical devices and procedures lack the ability to effectively visualize, access, and manipulate targeted anatomical tissues during medical procedures, particularly in the context of respiratory-gated imaging modalities.
Innovation Solution
The method involves forming a respiratory-gated point cloud to demarcate anatomical features, density filtering, classifying anatomical points of reference, and modifying segmented image datasets to match patient anatomy, while using steerable catheters with electromagnetic localization elements for precise tissue access and navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If respiratory-gated point cloud data is collected and processed through density filtering and classification to modify segmented image datasets, then the precision and accuracy of surgical navigation is improved, but the device complexity and processing time increase
Solution Approach 1:
The point cloud data is segmented into multiple discrete phases within the respiration cycle, allowing separate processing and classification of anatomical features at different respiratory states. This segmentation enables precise matching of pre-operative images to intra-operative anatomy by handling each phase independently.
Solution Approach 2:
The system performs preliminary density filtering and classification of point cloud data before surgical navigation. By pre-processing the respiratory-gated point cloud to identify and classify anatomical landmarks, the system establishes an accurate reference framework that guides subsequent surgical instrumentation without requiring complex real-time processing during the procedure.
2Productivity
If real-time dynamic visualization is implemented to track respiratory motion, then the ability to access targeted tissues is improved, but the computational requirements and processing time increase
Solution Approach 1:
The system utilizes periodic respiration cycles as the basis for data acquisition and processing. By gating point cloud collection to discrete phases of the periodic respiratory cycle, the system captures anatomical motion in a structured manner that enables efficient reconstruction and visualization without requiring continuous high-speed processing.
Solution Approach 2:
The system creates a virtual copy of the respiratory system's motion through point cloud reconstruction and image dataset modification. This virtual model replicates the dynamic anatomy, allowing surgical planning and navigation to be performed on the copied data without requiring real-time processing of actual intra-operative images, thereby reducing computational burden.
3Measurement precision
If multiple image datasets are acquired at different respiratory phases, then the accuracy of anatomical representation is improved, but the loss of time for data acquisition increases
Solution Approach 1:
Multiple image datasets are acquired during a single pre-operative imaging session, capturing anatomy at different respiratory phases before the surgical procedure begins. This preliminary acquisition of multi-phase data eliminates the need for repeated imaging during surgery, reducing intra-operative time while maintaining high anatomical representation accuracy.
Solution Approach 2:
The imaging system captures dynamic anatomical changes across respiratory phases by acquiring multiple datasets at different points in the respiration cycle. This dynamic approach freezes motion at various stages, creating a comprehensive temporal map of anatomical positions that can be referenced throughout the procedure without requiring continuous re-imaging.
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
Enhances the ability to locate and manipulate targeted tissues by providing real-time, accurate anatomical visualization and navigation, improving the precision and effectiveness of medical procedures.
Implementation Method 1
a steerable catheter equipped with an electromagnetic localization element for precise tissue access
Data Source
AI summary
A surgical instrument navigation system and method of use is provided that visually simulates a virtual volumetric scene of a body cavity of a patient from a point of view of a surgical instrument residing in the cavity of the patient, wherein the surgical instrument, as provided, may be a steerable surgical catheter with a biopsy device and/or a surgical catheter with a side-exiting medical instrument, among others. Additionally, systems, methods and devices are provided for forming a respiratory-gated point cloud of a patient's respiratory system and for placing a localization element in an organ of a patient.