Capillary X-Ray Detector Circuit for Charge Share Correction
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Solution Overview
Problem
The existing X-ray detection devices face image blurring due to charge share, where X-rays passing through small capillary holes are dispersed between adjacent pixel electrodes, leading to ambiguous X-ray incidence positions and reduced energy resolution.
Innovation Solution
An X-ray detection device is designed with a capillary having X-ray passing regions and an X-ray shielding region, where the detection circuit determines the correct pixel electrode portion for X-ray incidence and corrects or ignores the X-ray incidence, reducing the impact of charge share by determining the pixel electrode corresponding to the X-ray incidence position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the inner diameter of the X-ray passing regions of the capillary is made smaller than the pixel electrodes, then spatial resolution is expected to improve, but charge share occurs causing image blurring and reduced energy resolution
Solution Approach 1:
The detection circuit performs preliminary identification of charge share events by analyzing the distribution pattern of collected carriers across pixel electrodes. By detecting the characteristic pattern of dispersed carriers before final image reconstruction, the system can identify and correct charge share occurrences, preventing image blurring while maintaining the benefits of small capillary inner diameters
Solution Approach 2:
The detection circuit uses feedback mechanisms to analyze the carrier collection pattern across multiple pixel electrodes simultaneously. When charge share is detected (carriers dispersed to multiple electrodes), the system applies correction algorithms that use information from surrounding electrodes to reconstruct the true X-ray incidence position, thereby maintaining image quality despite the small capillary inner diameter
2Measurement precision
If carriers are dispersed and collected in multiple pixel electrode portions, then the X-ray incidence position becomes ambiguous, but the detection circuit can determine the correct pixel electrode to maintain position accuracy
Solution Approach 1:
The detection circuit merges information from multiple pixel electrodes by analyzing the carrier distribution pattern across adjacent electrodes. When charge share occurs, the system combines the partial carrier signals from multiple electrodes and applies correction algorithms to determine the true X-ray incidence position, thereby recovering the lost positional information that would otherwise be ambiguous
Solution Approach 2:
The detection circuit implements feedback by continuously monitoring the carrier collection pattern across the pixel electrode array. When dispersed carrier collection is detected, the system uses feedback from surrounding electrode signals to identify and correct the true incidence position, maintaining measurement precision despite information loss from carrier dispersion
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 improves energy resolution and suppresses image blurring by accurately determining the X-ray incidence position and correcting carrier dispersion, enhancing image clarity.
Implementation Method 1
The conversion portion absorbs an X-ray to generate carriers
Implementation Method 2
By making the central axes of the plurality of X-ray passing regions parallel to each other, only the parallel components of the X-ray can be made to pass through the X-ray passing regions
Data Source
AI summary
An X-ray detection device includes a capillary, an X-ray detection element, and a detection circuit. The capillary has a plurality of X-ray passing regions. The X-ray detection element has a conversion portion and a plurality of pixel electrode portions. The conversion portion faces the capillary and absorbs X-rays to generate carriers. The detection circuit detects carriers collected from the conversion portion through the plurality of pixel electrode portions. When a plurality of carriers generated by incidence of an X-ray are dispersed and collected in two or more of the pixel electrode portions, the detection circuit determines one of the pixel electrode portions corresponding to an X-ray incidence position and corrects and evaluates an amount of carriers in the one of the pixel electrode portions or ignores the incidence of the X-ray.