Radiographic Stitch Imaging Artifact Correction
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Solution Overview
Problem
Radiographic imaging systems face challenges in generating stitched images due to artifacts caused by overlapping radiographic imaging apparatuses, which are affected by imaging conditions such as distance and positional relationships between the apparatuses and the radiation source.
Innovation Solution
A radiographic imaging system that includes a correction image data determination unit to determine correction image data based on irradiation conditions and an image correction unit to correct the overlapping areas in stitched images using this data, minimizing the impact of artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple radiographic imaging apparatuses are arranged to perform stitch imaging, then the imaging area is extended, but image artifacts appear due to overlapping apparatus structures
Solution Approach 1:
The system performs preliminary actions by capturing reference images of each imaging apparatus before stitch imaging, storing structure information in advance. During actual stitch imaging, this pre-captured structure information is used to identify and remove artifacts from overlapping regions, preventing artifacts from degrading the final image quality while maintaining extended imaging coverage
Solution Approach 2:
The system extracts structure information from reference images captured by each imaging apparatus. This extracted structure information is then used to identify and remove artifact components from the stitched image in overlapping regions, effectively separating the useful structure information from harmful artifacts caused by apparatus overlap
2Measurement precision
If radiographic imaging apparatuses are positioned closer to the radiation source to improve image quality, then image artifacts from overlapping apparatuses become more prominent
Solution Approach 1:
The system uses a feedback mechanism where reference images are captured and structure information is extracted in advance. During stitch imaging, this pre-acquired structure information provides feedback to identify and remove artifacts from overlapping regions. This feedback loop allows the system to maintain high image quality by compensating for artifacts that become more prominent when apparatuses are positioned closer to the radiation source
3Adaptability or versatility
If the positional relationship between radiation source and imaging apparatuses is changed to optimize imaging, then artifact position and density in stitched images vary
Solution Approach 1:
The system performs preliminary capture of reference images under various imaging conditions before actual stitch imaging. This preliminary action stores structure information that corresponds to different positional relationships between the radiation source and imaging apparatuses. When imaging conditions change, the appropriate pre-captured structure information is selected and applied, allowing the system to adapt to different configurations while maintaining consistent artifact removal performance
Solution Approach 2:
The system changes parameters by capturing and storing reference images under multiple different imaging conditions (different positions, angles, and configurations). When actual stitch imaging is performed, the system selects and applies the appropriate structure information based on the current imaging parameters. This parameter-based approach allows flexible adaptation to different imaging configurations while maintaining consistent artifact removal
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 system effectively reduces the adverse effects of artifacts in stitched images, improving image quality by accounting for various imaging conditions and correcting for structure information from overlapping apparatuses.
Implementation Method 1
a plurality of radiographic imaging apparatuses D1 and D2 arranged to perform stitch imaging... An image (radiographic image) captured by a radiographic imaging apparatus that is positioned far from a radiation source may include a structure (image artifact) of a radiographic imaging apparatus that is positioned near the radiation source
Data Source
AI summary
A radiographic imaging system, which includes a plurality of radiographic imaging apparatuses each configured to acquire a radiographic image and a processing unit configured to combine a plurality of the radiographic images acquired from the plurality of radiographic imaging apparatuses to generate a stitched image, includes a correction image data determination unit configured to determine correction image data based on an irradiation condition of radiation to be emitted from the radiation source, and an image correction unit configured to correct an area of the stitched image corresponding to an area in which the plurality of radiographic imaging apparatuses overlap, by using the correction image data.