Mammography Projection Scaling for Moving Compression Plate
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Solution Overview
Problem
Mammography apparatuses face challenges in maintaining the appropriate size and readability of projected images on the compression plate as it moves, affecting the display of skin lines and informational characters during radiography.
Innovation Solution
An information processing device and method that acquires distance information to control the image projection unit, ensuring the projection image is scaled appropriately based on the changing distance from the image projection unit to the compression plate, maintaining a constant size and readability of guide and imaging information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the compression plate is moved to compress the breast, then the compression function is improved, but the projection distance changes causing the display image size to change
Solution Approach 1:
The patent applies dynamics by making the projection image size adjustable in response to changing projection distance. The image projection unit dynamically changes the projection image size based on the detected projection distance, allowing the system to adapt to the moving compression plate while maintaining appropriate image display size.
Solution Approach 2:
The patent changes the parameter of projection image size based on the projection distance. When the projection distance changes due to compression plate movement, the system modifies the projection image size parameter to compensate, ensuring the display image maintains an appropriate and consistent size on the compression plate.
2Measurement precision
If the projection image size is adjusted to match the breast size, then the skin line display accuracy is improved, but the character size consistency deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the handling of different elements in the projection image. The system adjusts the projection image size to match the breast size for accurate skin line display, while separately maintaining appropriate character sizes for informational display, allowing different parts of the projection to have different quality characteristics suited to their specific purposes.
3Device complexity
If the image projection unit is fixed, then the device complexity is reduced, but the adaptability to compression plate movement deteriorates
Solution Approach 1:
The patent replaces a potentially complex mechanical adjustment system with an information processing approach. Instead of mechanically adjusting the projection lens or image projection unit to track the compression plate, the system uses a detector to measure projection distance and an information processor to calculate and adjust the projection image size, substituting mechanical complexity with computational control.
Data Source
AI summary
An information processing device including at least one processor, wherein the processor is configured to: acquire distance information indicating a projection distance, which is a distance from an image projection unit that projects a projection image onto a projection surface of a compression member to the projection surface, in a mammography apparatus that irradiates a breast compressed by the compression member with radiation to capture a radiographic image; and control the image projection unit such that the projection image having a size corresponding to the projection distance indicated by the distance information is projected onto the projection surface in a case in which the image projection unit projects the projection image at a magnification corresponding to the projection distance.