Angulated Medical Viewing System for Stent Placement Monitoring
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Solution Overview
Problem
Current medical imaging techniques require multiple manual adjustments of the viewing direction to ensure proper placement of intravascular devices, such as stents, without obstructing renal arteries during endovascular aneurysm repair, as the connection points between renal arteries and the aorta are not always visible in a single view.
Innovation Solution
A medical viewing system and method that generate a virtual bi-plane view by creating a second angulated projection from a three-dimensional dataset, allowing clinicians to monitor ostia of branching vessels from different angles without changing the viewing direction, using an X-ray image acquisition device and data processing unit to overlay live X-ray images onto pre-operative three-dimensional reconstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple manual changes of viewing directions are performed to prevent blocking of renal arteries, then the completeness of anatomical structure visibility is improved, but the time required for the procedure and operational complexity increase
Solution Approach 1:
The patent applies dimensionality change by transitioning from a single two-dimensional X-ray view to a three-dimensional virtual model that can be viewed from multiple angles simultaneously. The system creates a 3D reconstruction of the aorta and renal arteries, allowing clinicians to rotate and view the anatomy from different perspectives without physically moving the C-arm device, thus resolving the contradiction between complete visibility and time consumption.
Solution Approach 2:
The patent uses copying by creating a virtual three-dimensional copy of the anatomical structures based on pre-acquired imaging data. This virtual model can be manipulated and viewed from any angle without requiring physical repositioning of the X-ray device, allowing multiple viewing directions to be obtained instantly from a single physical position, thereby eliminating time loss while maintaining complete anatomical visibility.
2Measurement precision
If multiple manual changes of viewing directions are performed to ensure proper stent placement, then the accuracy of device positioning is improved, but the procedural complexity and number of operations increase
Solution Approach 1:
The system enables accurate stent positioning by providing three-dimensional spatial context and multiple viewing angles of the vessel ostia simultaneously. Clinicians can assess the spatial relationship between the stent and renal artery openings from various perspectives without manually adjusting the viewing direction, making the positioning process both more accurate and easier to perform.
Solution Approach 2:
The virtual 3D model serves multiple functions: it provides anatomical orientation, measures distances and angles for precise stent placement, and allows viewing from any angle without requiring separate imaging procedures. This multi-functional tool simplifies the operator's task while maintaining high positioning accuracy.
3Ease of manufacture
If a fixed viewing angle is used for X-ray imaging, then the simplicity of the imaging process is maintained, but the visibility of anatomical structures at different orientations is insufficient
Solution Approach 1:
The patent resolves this contradiction by creating a three-dimensional virtual representation from which two-dimensional projections can be generated at any desired angle. The underlying 3D model preserves all anatomical information, allowing clinicians to view structures at the back of the aorta by rotating the virtual model, while the physical imaging process remains simple with a fixed C-arm position.
Solution Approach 2:
The system creates a virtual copy of the anatomical structures that can be viewed from any orientation without requiring additional physical imaging. This virtual copy contains complete anatomical information, allowing clinicians to examine previously hidden structures like the back of the aorta and renal artery ostia while maintaining the simplicity of a single fixed-angle physical scan.
Data Source
AI summary
In a medical viewing system having an X-ray image acquisition device a data processing unit is adapted for generating two different views on a three-dimensional image set, wherein a first view is corresponding to the viewing direction of the X-ray image acquisition device and a second view has a rotational offset to the first viewing direction. The first view may include live X-ray images, e.g. for monitoring a stent placement. The second view 10 supports a clinician to unambiguously judge whether ostia connection points may be blocked that are not clearly visible in anterior-posterior images.