X-ray Focal Spot Synchronization for Image Resolution
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Solution Overview
Problem
Existing x-ray source focal spot deflection methods fail to synchronize the switching of the focal spot position with the data acquisition system, leading to image quality degradation due to blurred focal spot size during transition periods, which hinders the achievement of improved image resolution.
Innovation Solution
An automated method and system that synchronize the x-ray source focal spot position with a deflection feedback signal, including monitoring and correcting synchronization errors, and embedding a computer-readable medium with a program to instruct synchronization, allowing for real-time feedback and correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If focal spot position switching is employed to increase image resolution, then image resolution is improved, but image quality degrades during transition periods due to blurred focal spot size
Solution Approach 1:
The system performs preliminary synchronization by detecting the phase relationship between the focal spot deflection signal and data acquisition system signal before data collection begins. The synchronization controller adjusts the timing of focal spot position switching to occur during predetermined safe periods when no data is being collected, ensuring that the transition does not cause blurring during the actual data acquisition phase.
Solution Approach 2:
The system employs feedback mechanisms where the synchronization controller continuously monitors the phase relationship between the focal spot deflection signal and the data acquisition system signal. Based on this feedback, the controller dynamically adjusts the timing of focal spot switching to maintain synchronization and ensure transitions occur only during safe periods when data collection is not active, thereby preventing image quality degradation.
2Speed
If focal spot switching occurs during data collection, then switching speed is maintained, but data collection is contaminated by blurred focal spot size
Solution Approach 1:
The system performs preliminary synchronization by detecting the phase relationship between the focal spot deflection signal and data acquisition system signal before data collection begins. The synchronization controller adjusts the timing of focal spot position switching to occur during predetermined safe periods when no data is being collected, ensuring that the transition does not cause blurring during the actual data acquisition phase.
Solution Approach 2:
The system operates the focal spot deflection in a periodic manner, switching between positions at predetermined intervals that are synchronized with the data acquisition cycle. By coordinating the switching frequency and timing with the periodic data collection rhythm, the system ensures transitions occur during safe periods (when no data is collected) while maintaining high switching speed during active data acquisition phases.
3Measurement precision
If automated synchronization is implemented, then synchronization precision is improved, but system complexity increases
Solution Approach 1:
The system introduces a synchronization controller as an intermediary component that mediates between the focal spot deflection system and the data acquisition system. This controller receives signals from both systems, detects their phase relationship, and generates appropriate control signals to coordinate their operation. By centralizing the synchronization function in this intermediary device, the system achieves precise timing coordination while managing complexity through functional specialization.
Solution Approach 2:
The system replaces manual synchronization adjustment with an automated electronic control mechanism. The synchronization controller uses electronic signal processing to detect phase relationships and adjust timing, substituting mechanical or manual adjustment methods with electronic automation. This substitution improves precision while the modular design of the controller helps manage the added complexity through standardized electronic interfaces and algorithms.
Data Source
AI summary
A method includes performing an at least partially automated method to synchronize an x-ray source focal spot (FS) position to a FS deflection feedback signal.