3D Vessel Visualization via Preoperative DSA and Intraoperative Fluorescence Overlay
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Solution Overview
Problem
Current visualization methods for vessels during medical interventions, such as 3D DSA, struggle to provide a comprehensive and up-to-date representation of blood vessels, especially in neuroradiology, as they are limited by the inability to accurately depict structures deep within the body and require multiple imaging modalities.
Innovation Solution
A method combining preoperative 3D digital subtraction angiography with intraoperative fluorescence angiography using ICG, involving 3D reconstruction, vessel identification, registration, and overlaying of images to enhance visualization, along with continuous 3D playback, utilizing a DSA X-ray system, ICG angiography device, image processing stages, and a 3D display device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 3D DSA rotation angiography is used for visualizing vessels, then vascular anatomy can be assessed in three dimensions, but the visualization is not up-to-date during interventions and cannot accurately depict structures deep within the body
Solution Approach 1:
The patent combines preoperative 3D DSA angiography data with intraoperative fluorescence angiography images to create a fused visualization. The 3D DSA provides anatomical structure while the intraoperative fluorescence imaging provides real-time functional information, merging two imaging modalities to achieve both accuracy and up-to-date representation during interventions
Solution Approach 2:
The system performs preliminary 3D reconstruction and vessel identification using preoperative DSA data before the intervention. This preprocessed 3D vascular model serves as a reference framework that can be dynamically updated with intraoperative fluorescence images, allowing the system to maintain accurate visualization while incorporating real-time changes
2Adaptability or versatility
If multiple imaging modalities are used to comprehensively depict vascular structures, then visualization completeness improves, but system complexity and difficulty of operation increase
Solution Approach 1:
The system uses a unified processing platform that handles both preoperative 3D DSA data and intraoperative fluorescence images through common workflows. The same image processing, registration, and visualization infrastructure handles multiple imaging modalities, reducing overall system complexity while maintaining versatility
Solution Approach 2:
The system introduces an intermediary registration and fusion module that automatically aligns 3D DSA data with 2D fluorescence images. This intermediary processing layer simplifies the integration of multiple modalities by providing automated registration based on anatomical landmarks and vessel structures, reducing the operational burden on users
3Measurement precision
If preoperative 3D DSA data is used for visualization, then anatomical structure is well-represented, but the data is not current during interventions when tissue may have displaced
Solution Approach 1:
The system transitions from a static preoperative 3D model to a dynamic visualization that continuously incorporates intraoperative fluorescence images. The 3D DSA anatomical model serves as a starting point but is dynamically updated with real-time fluorescence data, allowing the visualization to adapt to tissue displacement and changes during the intervention while maintaining anatomical context
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 provides an enhanced, real-time visualization of blood vessels, improving upon existing methods by integrating preoperative and intraoperative data, allowing for more accurate and dynamic representation of vascular structures during procedures.
Implementation Method 1
recording at least one current 2D fluorescence image of the examination region by means of fluorescence angiography
Implementation Method 2
using a preoperatively recorded 3D image dataset of the examination region
Data Source
AI summary
An imaging method for enhanced visualization of vessels in an examination region of a patient, in particular during an intervention, is proposed. A 3D reconstruction image of the examination region is generated using a preoperatively recorded 3D image dataset of the examination region. At least one current 2D fluorescence image of the examination region is recorded by a fluorescence angiography. The vessels are identified. The 3D image dataset with the image dataset of the 2D fluorescence or ultrasound image is registered based on the result of the identification. The 3D reconstruction image and the 2D image are overplayed. The overlaid images are 3D played back.