Coded Exposure X-ray Imaging for Motion Blur Correction
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Solution Overview
Problem
Existing X-ray imaging systems face image quality degradation due to motion blur, which can result in smeared high-frequency features and require prolonged acquisition times, additional mechanical capabilities, increased noise, or loss of image information during processing.
Innovation Solution
The implementation of a coded exposure sequence using an X-ray radiation source modulated by a source controller, coupled with digital X-ray detectors to acquire and process image data with coded motion blur, allowing for digital restoration of images to compensate for blurring effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional X-ray imaging is used to capture moving objects, then image acquisition is straightforward, but motion blur causes image quality degradation and loss of high-frequency features
Solution Approach 1:
The patent applies periodic action by using a coded exposure sequence where the X-ray source is modulated in a periodic pattern (on-off cycles) during image acquisition. This periodic modulation encodes motion information into the blurred image, allowing subsequent digital restoration to recover sharp images of moving objects while maintaining high-frequency features that would otherwise be lost to motion blur
Solution Approach 2:
The patent converts the harmful effect of motion blur into a beneficial signal by encoding motion information within the blur itself through coded exposure. Instead of treating motion blur as purely detrimental, the system uses it to carry encoded information about object motion, which is then decoded through digital processing to produce sharp, high-quality images while eliminating the need for mechanical anti-blur mechanisms
2Reliability
If conventional techniques are used to deal with motion blur, then image quality may be improved, but acquisition time is prolonged and system complexity increases
Solution Approach 1:
The patent replaces mechanical anti-blur systems (such as mechanical shutters, moving detectors, or gantry speed control mechanisms) with a digital signal processing approach. By using coded exposure modulation and digital restoration algorithms, the system achieves motion blur correction without requiring complex mechanical capabilities, thereby reducing acquisition time and system complexity while maintaining or improving image quality
Solution Approach 2:
The patent changes the exposure parameter from a constant on-state to a modulated coded exposure sequence. This parameter change enables the system to encode motion information into the image data, allowing digital restoration to recover sharp images without requiring prolonged acquisition times or additional mechanical anti-blur mechanisms
3Reliability
If mechanical capabilities are added to reduce motion blur, then image quality improves, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical anti-blur systems (such as mechanical shutters, moving detectors, or gantry speed control mechanisms) with a digital signal processing approach. By using coded exposure modulation and digital restoration algorithms, the system achieves motion blur correction without requiring complex mechanical capabilities, thereby reducing device complexity while maintaining or improving image quality
Solution Approach 2:
The patent converts the harmful effect of motion blur into a beneficial signal by encoding motion information within the blur itself through coded exposure. Instead of treating motion blur as purely detrimental, the system uses it to carry encoded information about object motion, which is then decoded through digital processing to produce sharp, high-quality images while eliminating the need for mechanical anti-blur mechanisms
4Reliability
If image processing is used to correct motion blur, then image quality may be improved, but image information is lost during processing
Solution Approach 1:
The patent applies preliminary action by encoding motion information into the image data during the exposure phase itself through coded exposure modulation. This preliminary encoding ensures that the motion information is preserved in the raw image data before processing, allowing subsequent digital restoration to recover sharp images without losing critical image information that would otherwise be irretrievably lost in conventional deblurring approaches
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 corrects for motion blurs in X-ray images, enabling the imaging of moving objects without stopping them, reducing acquisition time, and maintaining image quality, while preventing the loss of image information at specific frequencies.
Implementation Method 1
Certain such systems are based upon generation of X-rays that are directed toward a subject of interest
Implementation Method 2
Increasingly, such X-ray systems use digital circuitry for detecting the X-rays
Data Source
AI summary
An imaging system is provided. The imaging system includes an X-ray radiation source. The imaging system also includes a source controller coupled to the X-ray radiation source and configured to modulate an exposure pattern from the X-ray radiation source to enable a coded exposure sequence. The imaging system further includes a digital X-ray detector configured to acquire image data that includes at least one coded motion blur.