X-ray Imaging Angle Control Using 3D Vessel Models
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Solution Overview
Problem
Current X-ray diagnostic apparatuses face challenges in accurately determining suitable imaging angles for blood vessels, leading to issues like shortening of blood vessel images when they are parallel to the X-ray projection direction, requiring repeated imaging and complex reconstruction processes.
Innovation Solution
An X-ray diagnostic apparatus with a support mechanism and control unit that uses a three-dimensional model of blood vessels to adjust the imaging central line between the X-ray tube and detector to be orthogonal to the blood vessel axis, optimizing imaging angles and preventing shortening by calculating and displaying optimal imaging paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If imaging is performed repeatedly at different angles to avoid shortening, then measurement accuracy is improved, but examination time increases
Solution Approach 1:
The system performs preliminary actions by pre-calculating the optimal imaging angle based on the three-dimensional blood vessel model before actual imaging occurs. The control unit determines the angle at which the imaging central line is orthogonal to the blood vessel axis, allowing the operator to set the angle in advance and perform a single accurate imaging operation without repeated attempts.
Solution Approach 2:
The system uses a three-dimensional model (copy) of the blood vessel structure to determine imaging parameters without requiring repeated physical imaging attempts. By working with the digital model to calculate the orthogonal angle, the system eliminates the need for multiple imaging operations while ensuring measurement accuracy.
2Extent of automation
If three-dimensional reconstruction is performed using data from many directions, then automated processing is achieved, but imaging time and processing time increase
Solution Approach 1:
The system extracts only the essential information needed for angle determination from the three-dimensional blood vessel model, rather than performing complete multi-directional imaging and reconstruction. By taking out only the necessary spatial orientation data from the model, the system achieves automated angle calculation without the time-consuming process of acquiring and processing images from multiple directions.
Solution Approach 2:
The three-dimensional blood vessel model is prepared in advance, allowing automated angle calculation to be performed quickly without requiring real-time multi-directional imaging and reconstruction. The preliminary creation of the 3D model enables subsequent angle determination to be a simple computational task rather than a time-intensive imaging process.
3Measurement precision
If manual designation of blood vessel positions is required, then imaging accuracy is improved, but operational complexity increases
Solution Approach 1:
The system performs self-service by automatically calculating the optimal imaging angle based on the three-dimensional blood vessel model without requiring manual designation of blood vessel positions. The control unit independently determines the angle at which the imaging central line is orthogonal to the blood vessel axis, eliminating the need for operator intervention while maintaining positioning accuracy.
Solution Approach 2:
The system replaces the manual mechanical process of designating blood vessel positions with an automated computational process. Instead of requiring operators to manually identify and mark blood vessel locations, the control unit uses the three-dimensional model to calculate the optimal angle automatically, substituting human judgment with algorithmic processing.
Data Source
AI summary
An X-ray diagnostic apparatus includes an X-ray tube, an X-ray detector, a support mechanism which movably supports the X-ray tube and the X-ray detector, a storage unit which stores data of a three-dimensional model associated with a standard blood vessel structure, and a control unit which controls the support mechanism on the basis of the three-dimensional model so as to make an imaging central line between the X-ray tube and the X-ray detector become substantially orthogonal to a blood vessel axis of the three-dimensional model at a designated position.