X-ray Intensity Margin Correction via Expansion Rate Allocation
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Solution Overview
Problem
Hybrid pixel array detectors face challenges in correcting intensity distribution distortions at the margin, leading to reduced detection area and undetectable gaps between detectors due to signal interference from outside pixel positions and potential gradients.
Innovation Solution
A processing apparatus and method that calculate an expansion rate for X-ray intensity data on the margin side, generating an allocation function to redistribute data and correct intensity distribution distortions, allowing for expanded detection regions and reduced gaps between detectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guard ring is formed on the margin of the detector, then noise and leak current are suppressed, but the sensitive region becomes distorted and pixels cover a larger area causing signal interference from outside pixel positions
Solution Approach 1:
The patent applies parameter changes by introducing an expansion rate parameter that quantifies the distortion of the sensitive region. By calculating this expansion rate from intensity distribution data and using it to correct pixel positions, the system maintains the guard ring structure for noise suppression while compensating for its distorting effect on pixel positioning and signal accuracy.
2Area of stationary object
If the detection region is expanded to reduce gaps between detectors, then the undetectable gap is reduced, but the intensity distribution distortion at the margin increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating the expansion rate from intensity distribution data obtained during a calibration phase. This pre-computed correction parameter is then stored and applied to subsequent measurements, allowing the system to expand the detection region while maintaining intensity distribution uniformity through the预先-determined correction factor.
3Reliability
If virtual pixels are introduced to allocate count values, then gaps between read-out chips are addressed, but the complexity of the data processing algorithm increases
Solution Approach 1:
The patent applies the taking out principle by extracting the essential correction information (expansion rate) from the complex intensity distribution data. Instead of using complex virtual pixel allocation algorithms, the system extracts a single correction parameter that captures the marginal distortion effect, significantly simplifying the data processing while maintaining data completeness.
Data Source
AI summary
A processing apparatus that enables margin correction of X-ray intensity data includes a calculation unit configured to calculate an expansion rate of X-ray intensity data detected in a unit region on a marginal side on a basis of an intensity distribution resulted from detection of uniform X-ray and a first function generation unit configured to generate an allocation function that allocates the X-ray intensity data detected in the unit region on the marginal side to an outside unit region, on the basis of the expansion rate. Enabling margin correction on the basis of the intensity distribution resulting from detection of uniform X-ray makes it possible to correct the distortion of intensity distribution on the marginal side. As a result, it is possible to expand the detection region of X-ray intensity data.