X-Ray ROI Extraction by Grouping Non-Overlapping Projection Regions
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Solution Overview
Problem
Existing mammography machines using field-emitting X-ray sources for multi-view imaging face time-consuming issues in extracting mammary gland regions due to overlapping imaging regions, leading to motion artifacts and inefficient image reconstruction.
Innovation Solution
A region-of-interest extraction method that groups non-overlapping X-ray sources based on geometric position parameters, combines their imaging regions, and performs extraction on combined imaging regions to reduce the number of regions requiring processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple field-emitting X-ray sources are used for multi-view imaging, then imaging quality is improved, but extraction time of mammary gland regions increases
Solution Approach 1:
The patent combines multiple overlapping imaging regions from different X-ray sources into a single comprehensive imaging region. Instead of extracting regions of interest from each individual X-ray source separately, the method merges all imaging regions first, then performs a single extraction process on the combined region, significantly reducing the total extraction time while maintaining the use of multiple field-emitting X-ray sources for high-quality multi-view imaging
2Measurement precision
If traditional sequential extraction method is used for each projection imaging, then extraction accuracy is maintained, but processing efficiency decreases
Solution Approach 1:
The patent merges multiple projection images into a single combined imaging region before performing region of interest extraction. This approach maintains extraction accuracy by preserving all relevant anatomical information from different projection angles, while simultaneously improving processing efficiency by reducing the number of separate extraction operations needed
Solution Approach 2:
The patent segments the processing into two distinct phases: first combining all imaging regions from multiple X-ray sources, then performing extraction on the unified region. This segmentation allows the system to leverage the strengths of both approaches - comprehensive data collection from multiple sources and efficient single-pass extraction
Data Source
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Figure 3A
AI summary
A region-of-interest extraction method and an apparatus, and a device, a system and a storage medium are provided. The region-of-interest extraction method is applied to an X-ray imaging system. The X-ray imaging system includes a detector and an array X-ray source, the array X-ray source includes a plurality of X-ray sources having different projection angles, and imaging regions corresponding to the plurality of X-ray sources are formed on the detector. The method includes: acquiring geometric position parameters corresponding to the plurality of X-ray sources; grouping the plurality of X-ray sources according to the geometric position parameters of the plurality of X-ray sources, determining at least one X-ray source group, and imaging regions of X-ray sources in the same X-ray source group not overlapping with each other; combining the imaging regions of the X-ray sources in each of the at least one X-ray source group, so as to determine a combined imaging region corresponding to each of the at least one X-ray source group; and performing region-of-interest extraction on projection data in the combined imaging region corresponding to each of the at least one X-ray source group.