X-ray Detector Signal Analysis Module Dynamic Threshold Switching
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Solution Overview
Problem
Current X-ray detectors face challenges in generating high-quality projection measurement data due to limitations in the number of energy thresholds that can be analyzed, affecting the quality of X-ray radiation analysis and image reconstruction.
Innovation Solution
A quanta-counting or photon-counting X-ray detector with a detection unit that generates charge pulses for X-ray radiation, equipped with a signal analysis module capable of switching between different signal analysis parameters to increase the number of energy thresholds checked, thereby improving the resolution of projection measurement data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of energy thresholds to be analyzed is increased, then the quality of X-ray radiation analysis is improved, but the device complexity increases due to requiring separate signal comparators and counter elements for each threshold
Solution Approach 1:
The patent implements dynamic switching between different signal analysis parameter sets in the time domain. The detector channel can switch between first signal analysis parameters (with first energy thresholds) and second signal analysis parameters (with second energy thresholds), allowing multiple energy threshold configurations to be analyzed sequentially over time rather than requiring all thresholds to be processed simultaneously. This temporal multiplexing approach increases measurement precision without proportionally increasing device complexity.
Solution Approach 2:
The patent employs periodic switching between different sets of signal analysis parameters. The detector channel alternates between analyzing X-ray radiation with first energy thresholds and second energy thresholds in a periodic manner, generating respective count rates for each threshold set. This periodic action enables comprehensive energy spectrum analysis with multiple threshold configurations while maintaining a fixed, manageable device structure.
2Loss of information
If separate signal comparators and counter elements are provided for each energy threshold, then the spectral distribution analysis capability is improved, but the cost and space requirements increase
Solution Approach 1:
Instead of providing static, simultaneous processing capabilities for multiple energy thresholds requiring multiple comparators and counters, the patent implements dynamic reconfiguration of signal analysis parameters over time. A single detector channel can be dynamically programmed to analyze different energy threshold configurations sequentially, reducing hardware requirements while preserving spectral distribution information through temporal multiplexing.
Solution Approach 2:
The patent changes the operational parameters of the detector channel by switching between different sets of signal analysis parameters. The energy thresholds, comparator levels, and counting configurations are changed over time rather than being fixed, allowing the same hardware to perform multiple spectral analysis functions with different threshold settings, thereby reducing the need for duplicate hardware components.
3Productivity
If the frame time is reduced for faster image acquisition, then the productivity is improved, but the measurement precision of X-ray radiation decreases due to shorter integration time
Solution Approach 1:
The patent uses periodic switching between different signal analysis parameter sets during the frame time. By rapidly alternating between different energy threshold configurations and accumulating count rates for each, the system can maintain precise spectral analysis even with reduced overall frame times. The periodic sampling and accumulation approach preserves measurement precision while enabling faster image acquisition through efficient time utilization.
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 approach allows for increased energy and intensity resolution in X-ray imaging, enabling the generation of higher-quality projection measurement data and facilitating faster calibration of X-ray detectors.
Implementation Method 1
a detection unit (10) which generates a detection signal for X-ray radiation incident on the detection unit
Data Source
AI summary
An X-ray detector is disclosed, including a detection unit to generate a detection signal for incident X-ray radiation; a signal analysis module to determine a set of count rates for incident X-ray radiation based upon the detection signal and signal analysis parameters for X-ray radiation; and a switchover control unit for switching between first signal analysis parameters and second signal analysis parameters. When an amount of X-ray radiation is incident on the detection module, a first set of count rates is generated for a first time interval based upon first signal analysis parameters and a second set of count rates is generated for a second time interval based upon second signal analysis parameters, different from the first signal analysis parameters. An X-ray imaging system including the detector; a method for determining count rates for X-ray radiation; and a method for calibrating signal analysis parameters are also disclosed.