X-ray Imaging Apparatus Aneurysm Displacement Registration
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Solution Overview
Problem
Conventional X-ray imaging systems face challenges in accurately tracking the displacement of an aneurysm during catheter insertion due to deformation of blood vessels, leading to difficulties in matching three-dimensional projection images with real-time fluoroscopic images, which results in increased contrast media usage and patient burden.
Innovation Solution
An X-ray imaging apparatus that includes a three-dimensional blood-vessel image collecting unit, an X-ray image collecting unit, a composite-image creating unit, a displacement determining unit, and a registration unit, which collects and processes images to create a composite image that accounts for aneurysm displacement, allowing for accurate registration and display of the aneurysm position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a three-dimensional blood vessel image is collected before catheter insertion, then the blood vessel structure can be visualized, but the aneurysm position becomes displaced when catheter is inserted due to blood vessel deformation
Solution Approach 1:
The system dynamically adjusts the three-dimensional blood vessel image to match the actual blood vessel position during catheter insertion. The displacement determination unit calculates the difference between the pre-insertion and post-insertion aneurysm positions, and the registration unit updates the three-dimensional blood vessel image accordingly, making the system adaptive to real-time changes rather than static
Solution Approach 2:
The system uses feedback from real-time fluoroscopic images to correct the pre-collected three-dimensional blood vessel image. By continuously comparing the actual aneurysm position during the procedure with the recorded position, the system feeds back correction information to update the three-dimensional image, ensuring accurate registration throughout the intervention
2Measurement precision
If contrast media is continuously injected to track aneurysm position, then the aneurysm can be visualized in real-time, but the patient burden increases
Solution Approach 1:
The system collects the three-dimensional blood vessel image before catheter insertion and before continuous contrast media injection. This preliminary action allows the system to have a baseline reference of the blood vessel structure, eliminating the need for continuous contrast media injection to maintain visualization, thereby reducing patient burden while preserving measurement precision
Solution Approach 2:
The system creates a three-dimensional copy of the blood vessel structure from pre-insertion images. This digital copy serves as a reference model that can be dynamically adjusted and registered without requiring continuous physical contrast media injection, allowing real-time tracking through computational methods rather than continuous material administration
3Measurement precision
If the three-dimensional blood vessel image is updated manually, then the aneurysm position can be corrected, but the operation time increases
Solution Approach 1:
The system performs automatic displacement determination and image registration without requiring manual intervention. The displacement determination unit automatically calculates position differences by comparing pre and post insertion images, and the registration unit automatically updates the three-dimensional blood vessel image, making the system self-correcting and eliminating time-consuming manual operations while maintaining high registration accuracy
Data Source
AI summary
In an X-ray imaging apparatus according to an embodiment, a three-dimensional blood-vessel image collecting unit collects a three-dimensional blood vessel image. An X-ray image collecting unit collects an X-ray image. A composite-image creating unit then creates a three-dimensional projection image projected based on a state of the X-ray imaging apparatus from the collected three-dimensional blood vessel image, and creates a composite image of the created three-dimensional projection image and the X-ray image. A displacement determining unit then determines a displacement between an aneurysm on the three-dimensional projection image and the aneurysm on the X-ray image. Subsequently, a registration unit registers the composite image by using the determined displacement, and displays the registered composite image onto a display unit.