X-Ray Focal Spot Control Using Tube-Voltage Feedback
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Solution Overview
Problem
X-ray systems face challenges in maintaining focus size consistency when switching between high and low tube voltages, leading to reduced image quality due to changes in focus size, resolution, and contrast.
Innovation Solution
A system that includes a processor and storage device to determine a focusing parameter based on real-time feedback of the tube voltage, adjusting the focusing device to maintain the focus size within a specified range or to a fixed value, ensuring consistent focus during tube voltage switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tube voltage is switched between high and low for energy imaging, then energy imaging capability is improved, but focus size changes causing reduced image quality
Solution Approach 1:
The patent applies preliminary action by adjusting the focusing parameter in advance based on the tube voltage value. Before the tube voltage switching affects the focus size, the system pre-adjusts the focusing parameter to compensate for the expected focus size change, thereby maintaining consistent focus size throughout the energy imaging process
Solution Approach 2:
The patent implements feedback control by continuously monitoring the tube voltage and dynamically adjusting the focusing parameter in response. The system uses the tube voltage value as feedback to determine the appropriate focusing parameter, creating a closed-loop control system that maintains focus size consistency during voltage switching
2Adaptability or versatility
If tube voltage switching is performed for dual-energy imaging, then imaging versatility is improved, but image contrast and resolution deteriorate
Solution Approach 1:
By pre-adjusting the focusing parameter based on the tube voltage value before exposure, the system ensures that the focus size remains optimal for both high and low energy imaging modes, thereby maintaining image contrast and resolution across different energy levels
Solution Approach 2:
The system uses real-time feedback from the tube voltage control to dynamically adjust the focusing parameter, ensuring that the focus size remains consistent regardless of voltage changes, thus preserving image quality metrics such as contrast and resolution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution ensures that the focus size remains consistent, thereby improving the quality of images generated by maintaining optimal contrast and resolution during energy imaging techniques, such as dual-energy imaging.
Implementation Method 1
the focusing device may be configured to shape the focus of the radiation rays by generating an electric field under a focusing voltage
Implementation Method 2
the focusing device may be configured to shape the focus of the radiation rays by generating a magnetic field under a focusing current
Data Source
AI summary
A method may include obtaining a feedback or a reference value of a tube voltage applied to a radiation source of a radiation device for generating radiation rays. The method may also include determining, based on the feedback or the reference value of the tube voltage, a specific value of a focusing parameter associated with a focusing device of the radiation device. The method may further include causing the focusing device to shape a focus of the radiation rays according to the determined value of the focusing parameter. The focus of the radiation rays may satisfy an operational constraint under the specific value of the focusing parameter.