Dynamic 3D Overlay for Intravascular Device Guidance
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Solution Overview
Problem
Current 3D image overlay systems in interventional procedures lack accuracy due to deformation of soft tissue structures by interventional devices, making it challenging to guide devices precisely through narrow lumens without the use of nephrotoxic contrast agents and failing to provide real-time, clinically relevant anatomical information.
Innovation Solution
A medical imaging system that generates dynamic 3D overlays by non-rigid-body warping of the 3D image based on the 3D shape of the interventional device, using shape deformation modules and tracking technologies to update the overlay in real-time, ensuring accurate representation of the anatomy during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a static 3D image overlay is used during interventional procedures, then the overlay provides morphological information, but the accuracy deteriorates due to deformation of soft tissue structures by interventional devices
Solution Approach 1:
The patent transforms the static 3D overlay into a dynamic system that continuously updates the vessel morphology based on real-time device shape measurements. The overlay adapts to tissue deformation by incorporating live feedback from shape sensing technologies, allowing the anatomical representation to change dynamically during the procedure rather than remaining fixed.
Solution Approach 2:
The system implements a feedback loop where the interventional device's shape is continuously measured using shape sensing technologies (such as electromagnetic tracking or fiber-optic sensors), and this information is fed back to update the 3D overlay in real-time. This closed-loop approach ensures the overlay accurately reflects the current anatomical state despite device-induced deformations.
2Ease of operation
If interventional devices are inserted into vessels, then the treatment can be performed, but the vessel shape deforms making the static overlay inaccurate
Solution Approach 1:
The patent introduces an intermediary computational layer that translates raw shape sensing data from the interventional device into updated anatomical models. This intermediary processing layer reconciles the device shape measurements with the 3D overlay, providing accurate device position and orientation information even when the vessel morphology has changed due to device insertion.
3Loss of information
If x-ray contrast agents are used to define soft tissue structures, then the treatment site becomes visible, but nephrotoxicity increases
Solution Approach 1:
The patent replaces the chemical/physical mechanism of x-ray contrast agents with a computational approach. Instead of using contrast media to enhance x-ray visibility of soft tissues, the system uses shape sensing technologies and real-time computational modeling to define and display soft tissue structures, eliminating the need for nephrotoxic contrast agents entirely.
Data Source
AI summary
A medical method and system include a medical imaging system configured to generate images of an interventional procedure. An overlay generator is configured to generate an overlay image on the images of the interventional procedure. An interventional device tracking system is configured to track a three-dimensional position, orientation and shape of the interventional device during the procedure, wherein the overlay image is dynamically updated in response to deformations caused to an organ of interest by the interventional device during the procedure.