Photon-Counting CT Energy Bin Switching for Real-Time Contrast Imaging
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Solution Overview
Problem
Photon-counting CT devices face challenges in real-time data transmission due to the enormous amount of data generated, making it difficult to generate images required during surgical procedures like RealPrep.
Innovation Solution
The X-ray CT device adjusts data acquisition conditions based on the injection state of a contrast agent, bundles data into energy bins, and switches between single-energy-bin and multi-energy-bin modes to reduce data transmission, using a direct conversion type detector for substance discrimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If photon-counting CT device acquires data by counting X-ray photons for energy, then measurement precision is improved, but quantity of substance increases causing data transmission burden
Solution Approach 1:
The patent segments the continuous energy spectrum into discrete energy bins (e.g., 40-70 keV, 70-100 keV, 100-150 keV, 150-200 keV). The detector counts photons in each energy bin separately, enabling energy discrimination while reducing data complexity. This segmentation allows precise measurement of contrast agent concentration at different energy levels without transmitting overwhelming amounts of raw spectral data.
Solution Approach 2:
The patent changes the data representation parameter from continuous spectral data to discrete energy bin counts. By defining specific energy thresholds and counting photons in each bin, the system transforms complex spectral information into manageable count data. This parameter change enables real-time processing and transmission while preserving the essential energy discrimination capability needed for contrast agent detection.
2Productivity
If real-time image generation is required during surgical procedures, then productivity is improved, but device complexity increases due to data processing requirements
Solution Approach 1:
The system performs preliminary actions by pre-defining energy bin thresholds and acquisition conditions before the actual imaging procedure. The control device is configured with predetermined energy ranges and counting parameters, allowing the detector to directly output processed count data without requiring complex real-time spectral analysis. This preliminary configuration enables real-time image generation while keeping the processing system relatively simple.
3Measurement precision
If contrast agent injection state is monitored for RealPrep, then measurement precision is improved, but loss of time occurs during data processing and transmission
Solution Approach 1:
The patent extracts only the essential information needed for contrast agent detection by focusing on photon counts in specific energy bins rather than processing the complete spectral distribution. The system extracts count data from energy bins that are most sensitive to contrast agent presence (typically lower energy bins where contrast agents show strong attenuation). This extraction approach enables precise contrast agent monitoring while minimizing data processing time and allowing real-time decision-making during surgical procedures.
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 effectively reduces data transmission burden, enabling real-time image generation during RealPrep procedures by optimizing data processing and transmission.
Implementation Method 1
a so-called photon-counting CT device that acquires data obtained by counting the number of X-ray photons for energy
Data Source
AI summary
An X-ray CT device of an embodiment includes processing circuitry. The processing circuitry acquires data corresponding to energy when X-rays radiated by an X-ray tube are transmitted through a subject. The processing circuitry adjusts conditions including first and second conditions for the data when the data is acquired. The processing circuitry switches the condition from the first condition to the second condition when an injection state of a contrast agent injected into the subject satisfies a predetermined condition. The processing circuitry bundles the data discriminated into some of a plurality of energy bins.