Catheter Navigation Planning Using Tissue Elasticity Limits
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Solution Overview
Problem
Conventional navigation plans for catheters in medical target objects fail to adequately address complications such as vessel wall injuries, aneurysm ruptures, and thrombi detachment due to the reliance on operator experience with tissue stress estimation.
Innovation Solution
A method and system that create a navigation plan for a catheter based on a limit value distribution comprising spatially resolved limit values for maximum force absorption and permissible tissue deflection, using elasticity data and image data to guide the catheter safely into a target region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional navigation planning methods are used, then the navigation plan can be created based on image data, but complications such as vessel wall injuries, aneurysm ruptures, and thrombi detachment cannot be adequately prevented
Solution Approach 1:
The system performs preliminary calculation of tissue stress distribution and determines maximum force absorption capacity before catheter navigation. A navigation plan is created in advance that incorporates these pre-calculated tissue properties, allowing the catheter path to be planned while avoiding regions with low force absorption capacity or high stress concentration.
Solution Approach 2:
The patent introduces an intermediary computational model that acts as a mediator between image data and navigation planning. This model calculates tissue elasticity and stress distribution, translating anatomical images into mechanical property maps that guide safe catheter navigation without requiring direct operator experience with tissue stress.
2Measurement precision
If operator experience is relied upon for tissue stress estimation, then navigation can be performed, but the method lacks repeatability and precision
Solution Approach 1:
The patent replaces the mechanical system of operator experience and manual tissue stress estimation with a computational system. Image data is processed through algorithms that calculate tissue elasticity and stress distribution, providing objective, precise, and repeatable measurements without depending on operator expertise.
Solution Approach 2:
The system creates a computational model (virtual copy) of the tissue's mechanical properties based on image data. This digital twin allows for repeated analysis and simulation of different navigation scenarios without requiring repeated physical measurements or operator judgment.
3Ease of manufacture
If a navigation plan is created without considering tissue force absorption limits, then the planning process is simpler, but the risk of tissue damage increases
Solution Approach 1:
The patent changes the parameters used in navigation planning from purely anatomical features to include mechanical properties such as tissue elasticity and force absorption capacity. These parameters are derived from image data through computational modeling, enabling the navigation plan to account for tissue damage risks while maintaining automated processing.
Data Source
AI summary
A method is for creating a navigation plan for a catheter in tissue in dependence on a limit value distribution. In an embodiment, the method includes acquiring first elasticity data of the tissue via a first imaging modality; reading in first image data and assigning the first elasticity data to the first image data; determining the limit value distribution at least in dependence on the first elasticity data and assigning the limit value distribution to the first image data; and creating the navigation planfor the catheter in the tissue at least in dependence on the first image data and the limit value distribution.