X-ray Image Processor Partial Period Composition for Stent Blurring
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Solution Overview
Problem
In medical viewing systems using X-ray imaging, when the relative position of a balloon with a stent changes during endovascular interventional treatment, the stent becomes blurred in the composite image, leading to deteriorated visibility due to large displacements in images captured at different time points.
Innovation Solution
An X-ray imaging apparatus with an image processor that can switch between full period and partial period image composition modes, limiting image superimposition to specific frames to reduce positional changes and prevent blurring, thereby enhancing the visibility of the stent in the composite image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If full period image composition mode is used to superimpose all images in the image generation period, then the composite image includes all captured frames, but the stent becomes blurred due to large positional changes between images captured at different time points
Solution Approach 1:
The image generation period is segmented into multiple partial periods, and the image composition is performed separately for each partial period. This segmentation prevents the superimposition of images with large positional discrepancies, thereby maintaining stent sharpness while still accumulating sufficient image data for composite image generation.
Solution Approach 2:
Instead of superimposing all images in the full image generation period, the system performs partial superimposition by selecting only certain images or limiting the superimposition to specific time windows (partial periods). This partial action approach prevents excessive temporal separation between superimposed images, avoiding stent blurring while still achieving effective composite image formation.
2Productivity
If images captured at significantly different time points are superimposed to create composite image, then more images are included in the composite, but the relative position of balloon markers to stent changes causing stent blurring
Solution Approach 1:
The system performs partial image composition by selecting only images within acceptable temporal ranges for superimposition. This partial action maintains stent visibility (reliability) by excluding images with large positional changes, while still achieving productive composite image generation through selective accumulation of suitable frames.
Solution Approach 2:
The image composition system dynamically adjusts the selection criteria for superimposed images based on temporal proximity and positional stability. By making the composition process dynamic rather than static, the system can adaptively include or exclude images to maintain both productivity and reliability according to the actual imaging conditions.
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 apparatus effectively reduces or prevents the blurring of the stent in the composite image, maintaining clear visibility during procedures, and allows for early termination of radiation exposure by generating high-quality images in both modes.
Implementation Method 1
an image generator configured to generate an image based on a detection signal of radiation transmitted through a subject
Data Source
AI summary
An image processor (13) of an X-ray imaging apparatus (100) is configured to be switchable to a full period image composition mode in which a composite image (M) is generated by superimposing images in an entirety of an image generation period and a partial period image composition mode in which the composite image is generated by superimposing the images in a part of the image generation period.