Interventional Device Navigation via 2D-to-3D Mapping
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Solution Overview
Problem
Current navigation systems for interventional devices in tubular structures, such as vessels, rely on 2D X-ray projections that lack depth information, leading to distorted visualization and cluttered images, making it difficult for physicians to accurately navigate devices like guide wires or stents within complex vascular structures.
Innovation Solution
A method that maps the 2D position of interventional devices to a 3D dataset, allowing for real-time communication of three-dimensional information to the user, using X-ray fluoroscopy images and 3D data sets to provide enhanced navigational guidance by extracting local 3D parameters and displaying them in a comprehensible manner, even with monoplane X-ray fluoroscopy acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 2D X-ray projection images are used for device navigation, then the imaging process is simple and fast, but depth information is lost and visualization is distorted
Solution Approach 1:
The patent applies dimensionality change by mapping 2D fluoroscopy image coordinates to 3D vessel model coordinates. The system overlays 3D road-map images and device position information onto the 2D fluoroscopy plane, enabling depth perception and accurate spatial localization without requiring complex 3D imaging hardware. This resolves the contradiction by providing 3D measurement precision through 2D imaging systems.
2Loss of information
If 3D road-map images are overlaid on 2D fluoroscopy images, then depth information is provided, but the interventional image becomes cluttered
Solution Approach 1:
The patent applies local quality by providing navigational information selectively at the device location rather than throughout the entire image. The system extracts local 3D parameters (vessel diameter, tortuosity, branching angles) specifically at the current device position and displays them as graphical advisory information. This maintains image clarity while providing essential depth and spatial information where needed.
3Measurement precision
If multiple X-ray projections are acquired to provide depth information, then 3D vessel representation is improved, but X-ray dose to the patient increases
Solution Approach 1:
The patent applies preliminary action by acquiring a complete 3D vessel model (via CT, MRI, or rotational angiography) before the interventional procedure. This pre-acquired 3D dataset is then used throughout the procedure for navigation and localization without requiring additional X-ray projections. The system registers the pre-acquired 3D model with live fluoroscopy images, providing continuous depth information and vessel geometry without increasing patient radiation exposure during the intervention.
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
This approach enables accurate localization of interventional devices within tubular structures with high precision, reducing ambiguity and clutter in the imaging plane, while providing essential depth information for improved navigation and reduced X-ray dose during procedures.
Implementation Method 1
an X-ray image acquisition device with a source of X-ray radiation provided to generate X-ray radiation
Data Source
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AI summary
The present invention relates to navigating an interventional device. In particular, the invention relates to a system for navigating an interventional device within a tubular structure of an object, a method for navigating an interventional device within a tubular structure of an object as well as a computer program element and a computer-readable medium. In order to provide enhanced information to the user in an easily comprehensible manner while keeping the X-ray dose to a minimum, a system and a method for navigating an interventional device within a tubular structure of an object are provided, wherein the method comprised the following steps: a) Acquiring 2D X-ray fluoroscopy image data in one projection geometry of a region of interest of the tubular structure; b) detecting the interventional device in the 2D X-ray image; c) determining the 2D position of the interventional device in the 2D X-ray image; d) registering the at least one 2D X-ray image with a previously acquired 3D dataset of the region of interest of the tubular structure; e) mapping the determined 2D position of the interventional device to a position in the 3D dataset; f) extracting local 3D parameters of the tubular structure at the position of the interventional device; g) generating navigational information on behalf of the determined 3D position of the interventional device and the extracted local 3D parameters; and h) providing the navigational information to the user.