X-ray Detector Evaluation Unit Drift Correction
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Solution Overview
Problem
X-ray detectors face time-dependent, radiation-dependent, and temperature-dependent drift effects that impair image quality, necessitating efficient correction methods for digital measurement signals to ensure high-quality imaging.
Innovation Solution
An evaluation unit for x-ray detectors comprising multiple pixel-electronics modules with settable digital signal-processors that adapt digital pixel-measurement signals, allowing for real-time correction and improvement of measurement data records.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If costly materials handling and stabilization of operating conditions are used to reduce drift effects, then image quality is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces physical stabilization mechanisms (mechanical/thermal control systems) with a digital signal processing approach. The evaluation unit performs drift correction through digital signal processing of the measurement signals, eliminating the need for costly physical stabilization equipment while maintaining image quality.
Solution Approach 2:
The patent changes the operating parameters of the evaluation unit dynamically to compensate for drift effects. By adjusting signal processing parameters and applying correction algorithms based on detected drift conditions, the system maintains reliable operation without requiring physical stabilization of operating conditions.
2Measurement precision
If digital signal processing is used to correct drift effects, then measurement precision is improved, but processing time increases
Solution Approach 1:
The evaluation unit continuously monitors measurement signals for drift conditions and applies correction algorithms in real-time during the measurement process. By performing drift detection and correction continuously rather than as a separate post-processing step, the system maintains measurement precision without adding significant processing time delays.
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
The solution effectively corrects for drift effects, enhancing image quality by adapting digital pixel-measurement signals in real-time, thereby improving the accuracy and reliability of x-ray imaging data.
Implementation Method 1
In direct-conversion x-ray detector devices, the x-radiation or the photons can be converted into electrical pulses by way of a suitable converter material
Implementation Method 2
In indirect-conversion x-ray detector devices, the x-radiation or the photons can be converted into light by way of a suitable converter material and into electrical pulses via optically coupled photodiodes. Scintillators such as GOS (Gd2O2S), CsJ, YGO or LuTAG, for example, are often used as a converter material
Data Source
AI summary
An evaluation circuit for an x-ray detector for signaling coupling to a converter, designed to convert incident x-radiation into electrical signals. In at least one embodiment, the evaluation circuit includes a multiplicity of pixel-electronics modules. A respective pixel-electronics module is designed to process electrical signals fed into the respective pixel-electronics module from the converter, order to produce a respective digital pixel-measurement signal. Further, each of the respective pixel-electronics modules has at least one respective settable digital signal-processor, designed to adapt a respective processed digital pixel-measurement signal in a respective pixel-electronics module.