Multi-Energy X-Ray Pulse Synchronization for Real-Time Imaging
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Solution Overview
Problem
Current x-ray imaging systems face challenges in achieving real-time multi-energy imaging due to limitations in fast switching between different energy levels, which can result in motion artifacts and inadequate tissue/material separation, especially when imaging moving subjects or structures with varying densities.
Innovation Solution
The system employs a generator interface box (GIB) to control and synchronize an x-ray source generating alternating high and low energy pulses, allowing for real-time multi-energy imaging by adjusting parameters such as voltage, current, and pulse width, and skipping pulses as needed, while maintaining synchronization between the x-ray source and imager.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the x-ray source switches between different energy levels to achieve multi-energy imaging, then tissue/material separation is improved, but motion artifacts increase due to the time required for switching
Solution Approach 1:
The system uses periodic pulse trains at different energy levels (e.g., alternating high and low energy pulses) to acquire multi-energy data. This periodic switching allows the imaging system to capture multiple energy levels in rapid succession, minimizing motion artifacts while maintaining the ability to separate different tissue types through energy-dependent attenuation differences.
Solution Approach 2:
The system performs preliminary actions by pre-planning the pulse train sequence and synchronizing the imager readout periods with the expected arrival of pulses at different energy levels. This synchronization ensures that data from multiple energy levels are captured in the correct temporal order, reducing motion artifacts while maintaining tissue separation capability.
2Measurement precision
If the system acquires multiple energy levels sequentially, then tissue/material separation is improved, but imaging time increases leading to real-time imaging limitations
Solution Approach 1:
The system maintains continuous useful action by using overlapping readout periods that extend beyond individual pulse trains. Multiple pulse trains at different energy levels are acquired in succession with continuous detector readout, ensuring that data acquisition never stops and enabling real-time multi-energy imaging without requiring sequential pause between energy level acquisitions.
Solution Approach 2:
By implementing periodic pulse trains that alternate between different energy levels, the system continuously acquires multi-energy data in an interleaved manner. This periodic acquisition strategy allows both energy levels to be captured within the same imaging timeframe, maintaining real-time imaging capability while achieving tissue separation.
3Measurement precision
If the x-ray source generates alternating high and low energy pulses, then tissue/material separation is enhanced, but system complexity increases due to synchronization requirements
Solution Approach 1:
The system uses feedback mechanisms where the imager detects the arrival of pulses at different energy levels and adjusts readout timing accordingly. This feedback loop ensures that the readout periods are properly synchronized with the pulse train sequence, managing the complexity of alternating energy level acquisition through adaptive timing adjustment rather than rigid pre-programming.
Solution Approach 2:
The imaging system is designed with universal components that can handle multiple energy levels through a single detector and processing pipeline. The imager is configured to accept and process data from both high and low energy pulses using the same hardware infrastructure, reducing system complexity by avoiding separate dedicated pathways for each energy level while still achieving enhanced tissue separation.
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 enables improved visualization of specific tissue or material types by combining images from different energy levels, reducing artifacts from motion and enhancing tissue/material separation, thus providing clearer anatomical visualization.
Implementation Method 1
x-ray source constructed to generate a series of individual x-ray pulses... x-ray imager disposed so as to receive x-rays from the x-ray source and to detect the received x-rays for image generation
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~4C
AI summary
A system can have an x-ray source that generates a series of individual x-ray pulses for multi-energy imaging. A first x-ray pulse can have a first energy level and a subsequent second x-ray pulse in the series can have a second energy level different from the first energy level. An x-ray imager can receive the x-rays from the x-ray source and can detect the received x-rays for image generation. A generator interface box (GIB) controls the x-ray source to provide the series of individual x-ray pulses and synchronizes detection by the x-ray imager with generation of the individual x-ray pulses. The GIB can control x-ray pulse generation and synchronization to optimize image generation while minimizing unnecessary x-ray irradiation.