3D CT Co-Registration via Fluoroscopy Pathways for Intravascular Data
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Solution Overview
Problem
Current methods lack the ability to accurately co-register intravascular data with three-dimensional CT models, leading to decreased accuracy in treatment recommendations and procedures.
Innovation Solution
A system that co-registers intravascular data with a three-dimensional CT-based model by mapping x-ray fluoroscopy images and CT imaging data to create a two-dimensional pathway, identifying the most similar pathway, and projecting the data back to the three-dimensional model for precise location display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If intravascular data is co-registered with a three-dimensional CT model using current methods, then the physician can obtain additional anatomical insight, but the location accuracy of measurements decreases due to estimation requirements
Solution Approach 1:
The patent introduces fluoroscopy-based two-dimensional pathway as an intermediary representation that bridges intravascular data and the three-dimensional CT model. The intravascular data is first co-registered with the fluoroscopy pathway, which then serves as a mediator to map measurements to the three-dimensional CT model, eliminating the need for direct estimation and improving location accuracy while preserving anatomical insight
Solution Approach 2:
The patent employs dimensionality transformation by representing the three-dimensional CT model as multiple two-dimensional pathways at different angles. This allows intravascular data to be mapped to the appropriate two-dimensional pathway that matches the fluoroscopy angle, and then projected back to three-dimensional space, achieving accurate spatial localization without direct three-dimensional estimation
2Productivity
If a physician estimates the locations of intravascular data within the CT model, then the procedure can continue without additional co-registration steps, but the accuracy in treatment recommendations decreases
Solution Approach 1:
The patent performs preliminary co-registration by creating a fluoroscopy-based two-dimensional pathway representation before mapping the intravascular data to the three-dimensional CT model. This preliminary step establishes accurate spatial relationships in advance, allowing the procedure to continue efficiently while ensuring high accuracy in treatment recommendations through the pre-established co-registration framework
Data Source
AI summary
A co-registration system includes a processor circuit that receives x-ray fluoroscopy images of a blood vessel while an intravascular catheter moves through the blood vessel. The processor circuit also receives intravascular data from the intravascular catheter as the catheter moves through the blood vessel. The processor circuit generates a 2D pathway based on the fluoroscopy images. The processor circuit generates an additional 2D pathway from a 3D CT model. The processor circuit performs a co-registration between the intravascular data and the CT-based 2D pathway based on a mapping between corresponding locations of the fluoroscopy-based 2D pathway and the CT-based 2D pathway. The processor circuit performs an additional co-registration between the intravascular data and the 3D CT model based on the first co-registration and outputs the 3D model with a graphical representation of the intravascular data to a display.