Dynamic X-ray Tube Parameter Adjustment for Dose Optimization
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Solution Overview
Problem
In x-ray imaging systems, fixed tube voltage and current settings can result in either excessive or insufficient radiation doses for patients of varying body sizes, leading to inaccurate imaging due to differing attenuation angles.
Innovation Solution
A method and apparatus for determining tube electrical parameters, including acquiring projection data and noise data at different scan angles, to adjust tube voltage and current dynamically based on noise data and image quality requirements, ensuring optimal imaging while minimizing radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed tube voltage and current settings are used, then the imaging system is simple to operate, but the radiation dose becomes excessive or insufficient for patients of varying body sizes
Solution Approach 1:
The patent implements dynamic adjustment of tube voltage and current based on real-time noise data acquisition and analysis. The system continuously monitors noise levels during scanning and automatically modifies electrical parameters to maintain optimal image quality while minimizing radiation exposure, transforming the static fixed-parameter system into a dynamic adaptive system.
Solution Approach 2:
The system establishes a feedback loop by acquiring noise data during the scanning process, analyzing the current image quality, and using this information to adjust tube electrical parameters for subsequent scanning angles. This closed-loop control ensures that radiation dose is optimized based on actual imaging conditions rather than predetermined fixed values.
2Device complexity
If fixed tube voltage and current settings are used, then the system complexity is low, but the imaging accuracy deteriorates due to differing attenuation angles
Solution Approach 1:
The system dynamically adjusts tube electrical parameters according to the specific scan angle and corresponding noise characteristics. By adapting parameters in real-time based on the scanning angle and measured noise levels, the system maintains high imaging accuracy across different body regions without requiring overly complex pre-programmed parameter sets for every possible scenario.
Solution Approach 2:
The patent changes the electrical parameters (voltage and current) based on noise data analysis and scan angle information. This parameter adaptation allows the system to compensate for varying attenuation characteristics at different angles, maintaining imaging precision without implementing a fully complex system that would require exhaustive parameter optimization for every condition.
3Measurement precision
If noise data-based parameter adjustment is implemented, then image quality improves, but the device complexity increases
Solution Approach 1:
The system performs self-adjustment by automatically acquiring noise data, analyzing the current image quality, and modifying its own electrical parameters without requiring external intervention or complex external control systems. The imaging device serves itself by using its own measured data to optimize its operation, reducing the need for additional complex control infrastructure.
Solution Approach 2:
The implementation uses feedback from measured noise data to drive parameter adjustments. By relying on direct measurements from the imaging process itself rather than external complex sensing systems, the method improves image quality through a relatively simple feedback mechanism that uses the imaging device's own operational data.
Data Source
AI summary
Provided is a method for determining tube electrical parameters. The method includes: acquiring target projection data of an imaging device in scanning a target object at a first scan angle; acquiring target noise data corresponding to the target object; determining current noise data corresponding to the target projection data; and determining, based on the target noise data and the current noise data, the tube electrical parameters of the imaging device in scanning the target object at a second scan angle.