X-ray Data Processing Apparatus Charge Sharing Correction
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Solution Overview
Problem
Conventional X-ray data processing methods struggle with charge sharing, leading to residual images on higher energy sides in lower energy data, which hampers precise analysis and accurate separation of multiple wavelength X-rays, especially when using detectors without energy discrimination functions.
Innovation Solution
An X-ray data processing apparatus and method that calculates and corrects for charge sharing events by managing and reconfiguring data using energy threshold values, allowing for the subtraction of detection amounts caused by higher energy X-rays from lower energy data, thereby removing residual images and enhancing analysis accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wavelength X-rays are simultaneously measured using a detector without energy discrimination function, then measurement efficiency is improved and all pixels can be utilized, but charge sharing occurs causing residual images on lower energy side that degrade measurement precision
Solution Approach 1:
The patent converts the harmful charge sharing effect into a beneficial signal by recognizing that charge sharing creates a characteristic tail distribution on the lower energy side. By calculating the tail intensity and subtracting it from the lower energy data, the system eliminates residual images while maintaining the advantages of simultaneous multi-wavelength measurement.
Solution Approach 2:
The patent performs preliminary calculation of the tail intensity caused by charge sharing before final data analysis. By pre-calculating the expected tail distribution based on higher energy data and subtracting it in advance, the system removes the harmful effect before it interferes with precise measurement of lower energy X-rays.
2Measurement precision
If hardware modifications are made to eliminate charge sharing (such as adding grooves or TSVs to detector), then charge sharing is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent replaces mechanical/hardware solutions for eliminating charge sharing with a computational approach. Instead of modifying the detector structure with grooves or TSVs, the system uses software-based tail intensity calculation and subtraction to achieve the same goal of eliminating charge sharing effects, thereby avoiding increased device complexity.
Solution Approach 2:
The patent changes the approach from physical modification to parameter-based correction. By introducing the tail intensity parameter calculated from higher energy data and using it to correct lower energy data, the system achieves charge sharing elimination through parameter manipulation rather than structural modification.
3Measurement precision
If intensity ratio method is used to avoid charge sharing effect, then some correction is achieved, but data from pixels with simultaneous multiple wavelength incidence cannot be processed and intensity is lost
Solution Approach 1:
The patent introduces the tail intensity as an intermediary element that mediates between higher energy and lower energy data. By calculating the tail intensity from higher energy data and using it as a correction term for lower energy data, the system preserves information from pixels with simultaneous multiple wavelength incidence rather than losing it.
Solution Approach 2:
The patent implements a feedback mechanism where higher energy data is used to calculate tail intensity, which then feeds back to correct lower energy data. This closed-loop approach ensures that information from overlapping regions is preserved and properly corrected rather than lost.
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 cancels out charge sharing effects, improving the accuracy of X-ray analysis for multiple wavelength measurements to match single-wavelength precision and enabling accurate separation of incident multiple wavelengths.
Implementation Method 1
Each pixel of this X-ray detector receives the X-ray, and outputs a pulse signal corresponding to the wavelength of the X-ray
Implementation Method 2
charge sharing occurs when an X-ray is detected by a plurality of pixels. The charge sharing refers to a phenomenon that a tail is generated on a lower energy side by the generated charges spanning a plurality of pixels
Data Source
AI summary
An X-ray data processing apparatus for processing X-ray data that is obtained by simultaneously measuring X-rays of multiple wavelengths. The apparatus includes a management unit 210 to receive and manage X-ray data that is detected by a detector, a calculation unit 230 which calculates a detection amount of charge sharing events in lower energy side data caused by higher energy X-ray, based on the higher energy side data obtained using a threshold value on a higher energy side and the lower energy side data obtained using a threshold value on a lower energy side of the received X-ray data, and a correction unit 250 to reconfigure the lower energy side data using the calculated detection amount. The apparatus can remove a residual image of an X-ray on a higher energy side which remains in data on a lower energy side.