Intravascular Image Display for Optimal View Angle Selection
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Solution Overview
Problem
Current methods for determining an optimal view angle for intravascular interventions using X-ray diagnostic apparatuses are inefficient, as they often result in foreshortening of coronary arteries, making it difficult to identify the morbid part and can vary across cardiac phases, leading to time-consuming and suboptimal results.
Innovation Solution
An image display method and apparatus that prepares and displays three-dimensional image data with temporal elements, allowing for the selection of optimal view angles by fixing multiple display conditions or phases, enabling quick determination of the best angle for intravascular interventions by displaying moving images of coronary arteries in relation to heartbeat movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional rotating coronary artery images are displayed to determine optimal view angle, then the ability to identify morbid parts is improved, but the time required for determination increases and foreshortening still occurs at suboptimal angles
Solution Approach 1:
The patent segments the coronary artery visualization into multiple fixed view angle images (e.g., RAO 30°, RAO 60°, RAO 90°, LAO 30°, LAO 60°, LAO 90°) rather than displaying a continuous rotating 3D model. This segmentation allows the operator to quickly compare specific predetermined angles without navigating through all possible rotation angles, thereby reducing determination time while maintaining identification accuracy.
Solution Approach 2:
The patent prepares and displays multiple three-dimensional images at predetermined view angles in advance before the actual intervention. These pre-prepared images allow the operator to quickly identify the optimal view angle without needing to perform time-consuming real-time 3D rotation during the procedure, thus reducing the time loss while maintaining measurement precision.
2Measurement precision
If multiple view angles are displayed to avoid foreshortening, then the accuracy of coronary artery length measurement is improved, but the complexity of image display increases
Solution Approach 1:
The patent applies local quality by displaying multiple three-dimensional images, each optimized for a specific local view angle (e.g., RAO 30°, RAO 60°, RAO 90°, LAO 30°, LAO 60°, LAO 90°). Each image is tailored to a specific angular perspective, allowing accurate measurement of coronary artery length from that particular angle without requiring complex real-time rotation capabilities.
Solution Approach 2:
The patent introduces dynamic switching capability between different predetermined view angles. The display system can dynamically switch between RAO and LAO angles at specific degrees, providing the operator with flexible access to different perspectives. This dynamic switching simplifies the overall system compared to continuous 3D rotation while maintaining the ability to measure coronary artery length accurately from multiple angles.
3Ease of operation
If real-time 3D rotation of coronary artery is enabled, then the ease of finding optimal view angle is improved, but the reliability of foreshortening avoidance decreases
Solution Approach 1:
The patent segments the view angle selection into discrete predetermined angles (RAO 30°, RAO 60°, RAO 90°, LAO 30°, LAO 60°, LAO 90°) rather than allowing continuous rotation. This segmentation provides reliable, pre-validated angles that are known to minimize foreshortening, while still maintaining ease of operation through simple switching between these predefined options.
Solution Approach 2:
The patent incorporates feedback by displaying the actual view angle information (e.g., RAO 30°, LAO 60°) alongside the corresponding three-dimensional images. This feedback mechanism allows the operator to confirm the selected angle and understand the current perspective, thereby increasing reliability in avoiding foreshortening while maintaining ease of operation through clear angle indication.
Data Source
AI summary
An image data apparatus comprises a view angle defining section for defining a plurality of view angles relative to an object of examination, an image data preparing section for preparing a plurality of three-dimensional image data for the plurality of view angles from four-dimensional image data of the object of examination and a display control section for displaying moving images of the three-dimensional image data of the object of examination on a monitor screen under the condition that the view angles are fixed.