3D Model Superimposition for X-ray Device Localization
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Solution Overview
Problem
Current medical imaging technologies face challenges in accurately determining the position of indwelled devices, such as stent grafts, within the body during procedures, due to the difficulty in visualizing these devices within X-ray images, which can lead to misalignment and potential complications.
Innovation Solution
A medical image-processing system that includes an image processing apparatus capable of determining the position of a feature point of a device in an X-ray image and generating a superimposed image by overlaying a 3D model of the device onto the X-ray image, using markers on the device to align the model accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional X-ray imaging is used to visualize indwelled devices, then the imaging process is simple and quick, but the device position cannot be accurately determined due to poor visualization
Solution Approach 1:
The patent introduces a 3D model as an intermediary representation that bridges the gap between the indwelled device and the X-ray images. The 3D model serves as a mediator that can be superimposed on 2D X-ray images to enable accurate position determination, resolving the contradiction by adding a computational layer without requiring complex hardware modifications
Solution Approach 2:
The patent transforms the visualization problem from 2D X-ray image analysis to 3D spatial representation by generating and superimposing 3D models of the indwelled device. This dimensionality change enables accurate position determination by providing depth information and spatial context that is not available in conventional 2D X-ray imaging
2Measurement precision
If markers are added to the device for better visualization, then device localization accuracy improves, but the device structure becomes more complex
Solution Approach 1:
The patent creates a digital 3D model copy of the indwelled device that can be superimposed on X-ray images for localization. This virtual copy serves the same visualization function as physical markers would, but without adding any physical complexity to the actual device structure
Solution Approach 2:
The patent replaces the mechanical approach of adding physical markers to the device with a computational approach using 3D model generation and superimposition. This substitution achieves the same localization accuracy without modifying the physical device structure
3Measurement precision
If 3D models are superimposed on X-ray images for precise localization, then device position accuracy improves, but the processing time and computational resources increase
Solution Approach 1:
The patent performs preliminary actions by pre-generating 3D models of the indwelled device based on design specifications or pre-acquired imaging data. These pre-generated models are stored and can be quickly superimposed on intraoperative X-ray images, reducing processing time during the actual procedure while maintaining high localization accuracy
Data Source
AI summary
A medical image-processing apparatus according to an embodiment includes processing circuitry configured to determine a position of a feature point of a device in a first X-ray image, and generate a superimposed image in which a 3D model expressing the device is superimposed on the first X-ray image or a second X-ray image that is acquired later than the first X-ray image. The processing circuitry is configured to superimpose the 3D model on the first X-ray image or the second X-ray image at a position based on the position of the feature point.