Adaptive Artifact Correction in Digital X-ray Detectors
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Solution Overview
Problem
Digital X-ray imaging systems face issues with image artifacts due to non-ideal characteristics of semiconductor devices, such as charge leakage through FETs, leading to indiscriminate correction that increases noise and read time.
Innovation Solution
Implementing an artifact correction process that determines the necessity of correction based on specific criteria, using interspersed scan-on and scan-off reads to only correct images with significant artifacts, thereby maintaining image quality and reducing unnecessary noise and read time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If artifact correction process is applied to all images, then image quality with artifacts is improved, but noise increases and read time increases for images without artifacts
Solution Approach 1:
The patent applies artifact correction selectively rather than universally. The system performs scan-off reads to detect artifacts and applies correction only to images that exhibit significant artifacts, leaving images without artifacts uncorrected. This partial application of correction resolves the contradiction by improving quality only where needed while avoiding unnecessary time penalties for already-good images.
Solution Approach 2:
The system implements a feedback mechanism where scan-off reads continuously monitor for artifact presence. Based on the detected artifact levels, the system dynamically decides whether to apply correction processing. This feedback-driven approach ensures correction is applied only when beneficial, preventing unnecessary noise addition and time consumption for images that don't require correction.
2Measurement precision
If artifact correction process is applied to all images, then image quality with artifacts is improved, but noise increases in corrected images
Solution Approach 1:
The patent applies artifact correction selectively rather than universally. The system performs scan-off reads to detect artifacts and applies correction only to images that exhibit significant artifacts, leaving images without artifacts uncorrected. This partial application of correction resolves the contradiction by improving quality only where needed while avoiding unnecessary noise penalties for already-good images.
Solution Approach 2:
The system uses scan-off reads (which detect harmful artifacts) to determine when correction should be applied. By converting the detection of harmful artifacts into a decision-making mechanism, the system ensures correction is only applied when beneficial, preventing the introduction of noise into images that don't have artifacts in the first place.
3Measurement precision
If scan-off reads are performed to detect artifacts, then artifact detection accuracy is improved, but read time increases
Solution Approach 1:
The patent performs scan-off reads selectively as a preliminary step to detect artifacts before deciding whether full correction is needed. This partial reading approach allows the system to quickly identify images requiring correction while minimizing the time impact on the overall imaging workflow by not always performing complete correction sequences.
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 ensures that only images requiring correction are processed, minimizing noise and read time for images without artifacts, while improving the quality of corrected images.
Implementation Method 1
Light is emitted by a scintillator in response to X-rays absorbed from the source.
Implementation Method 2
The photodiodes sense the emitted light and are partially discharged. Each photodiode integrates the light signal and discharges energy in proportion to the X-rays absorbed by the detector.
Data Source
AI summary
Systems, methods and apparatus are provided through which in some embodiments indiscriminate correction of unintended charge in a digital X-ray detector is reduced by analyzing an unintended charge of a digital X-ray detector; and determining a significance of the unintended charge.