Vascular Image Adaptation for 2D-3D Angiographic Correspondence
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Solution Overview
Problem
The challenge of accurately visualizing the correspondence between projection and volumetric angiographic images is hindered by factors such as vessel tortuosity, overlap, bifurcation, and movement due to cardiac motion and interventional devices, leading to difficulties in planning and performing interventional procedures.
Innovation Solution
A system that adapts volumetric angiographic images using projection images to optimize correspondence, enhancing spatial resolution and accounting for vessel deformations, by deforming vessel paths, extending vessels, adjusting cross-sectional shapes, and integrating intensity profiles, thereby generating an improved image representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If volumetric angiographic images are used for interventional procedure planning, then three-dimensional vascular structure information is obtained, but the ability to visualize correspondence with projection images during the procedure deteriorates due to inferior image resolution and vessel movements
Solution Approach 1:
The system merges projection angiographic images with volumetric angiographic images by registering the projection images to the volumetric data and overlaying them. This combination allows physicians to see both the high-resolution 2D projection images and the 3D volumetric information simultaneously, resolving the contradiction between obtaining 3D structure information and maintaining the ability to visualize correspondence during procedures.
Solution Approach 2:
The system projects 3D volumetric angiographic data into 2D projection views that match the perspective of the fluoroscopic images. By rendering the volumetric data in multiple 2D dimensions from different angles, the system enables direct visual comparison between the 3D pre-procedural planning data and the 2D intra-procedural projection images, maintaining correspondence visualization despite the dimensional difference.
2Loss of information
If physicians refer back to volumetric angiographic images during interventional procedures, then planning information is accessed, but the process becomes cumbersome due to vessel tortuosity, overlap, and bifurcation
Solution Approach 1:
The system dynamically updates the overlay of projection images on volumetric data in real-time during the interventional procedure. As the catheter moves through the vasculature and the patient's anatomy shifts, the system continuously adjusts the registration and rendering to maintain accurate correspondence, eliminating the need for physicians to manually switch between separate 2D and 3D image views and improving procedural efficiency.
3Speed
If projection angiographic images are used during interventional procedures, then real-time guidance is provided, but the ability to visualize three-dimensional vascular structures deteriorates
Solution Approach 1:
The system combines real-time 2D projection angiographic images with pre-acquired 3D volumetric angiographic data by registering the projection images to the volumetric dataset and overlaying them. This merging allows physicians to maintain real-time guidance capability while simultaneously visualizing three-dimensional vascular structures, as the 3D information is rendered in 2D projection views that match the fluoroscopic perspective.
Data Source
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AI summary
A system for providing an image representation of a vascular region, is provided. The system comprises one or more processors configured to: receive volumetric angiographic image data comprising a volumetric image (120) of the vascular region; receive projection angiographic image data comprising one or more projection images (1301..i) of the vascular region; adapt the volumetric image (120) using the one or more projection images (1301..i) to provide an adapted volumetric image (120A); and output an image representation of the vascular region, the image representation being generated using the adapted volumetric image (120A).