Protective Cover Scattered Ray Removal Grid for Biopsy Imaging
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Solution Overview
Problem
In biopsy pre-imaging, the contrast of breast images is decreased due to the influence of scattered radiation, and existing scattered ray removal grids in mammography apparatuses cause vignetting, which affects image quality.
Innovation Solution
A protective cover with a scattered ray removal grid that alternately arranges transmission and absorption parts, where the boundary line between these parts extends orthogonally to the direction of radiation flux, is positioned between the imaging surface and the puncture needle, allowing for displacement and rotation to optimize image capture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a scattered ray removal grid is used to suppress scattered radiation influence, then image contrast is improved, but vignetting of radiation increases
Solution Approach 1:
The patent applies asymmetry by configuring the scattered ray removal grid with an asymmetric pattern where the boundary line between transmission and absorption parts extends in the second direction (orthogonal to radiation flux), rather than symmetrically in both directions. This asymmetric orientation allows the grid to selectively remove scattered rays while maintaining optimal radiation transmission and minimizing vignetting effects.
Solution Approach 2:
The patent changes the orientation parameter of the scattered ray removal grid, specifically setting the boundary line direction to extend in the second direction (orthogonal to radiation flux) rather than the conventional first direction. This parameter change optimizes the balance between scattered ray removal effectiveness and radiation transmission, reducing vignetting while maintaining image contrast.
2Reliability
If a protective cover is attached to protect the imaging surface from the puncture needle, then the imaging surface is protected, but scattered radiation removal capability is reduced
Solution Approach 1:
The patent merges two previously separate functions into a single integrated protective cover: (1) protection of the imaging surface from the puncture needle, and (2) removal of scattered radiation. By integrating the scattered ray removal grid directly into the protective cover structure, the system achieves both protective and image quality enhancement functions simultaneously, eliminating the trade-off between protection and scattered radiation removal.
Solution Approach 2:
The protective cover is designed with multi-functionality, serving both as a physical barrier to protect the imaging surface from needle contact and as a scattered radiation removal device through the integrated grid. This universal design allows a single component to fulfill multiple critical functions that were previously required from separate devices.
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 configuration suppresses the decrease in image contrast and reduces vignetting, improving the quality of breast images during biopsy pre-imaging by effectively removing scattered radiation while maintaining clear radiation transmission.
Implementation Method 1
a scattered ray removal grid that removes scattered rays generated by the radiation transmitting through the breast
Data Source
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AI summary
A protective cover includes a flat plate-like protective member (37A), and a scattered ray removal grid (44), in which the scattered ray removal grid is a grid in which a plurality of transmission parts (47) that transmit the radiation and a plurality of absorption parts (46) that absorb the radiation are alternately arranged and a boundary line between the transmission part and the absorption part extends in one direction, and further, in a case in which, on the imaging surface (24A), a direction connecting a chest wall side and a side opposite to the chest wall is defined as a first direction and a direction orthogonal to the first direction is defined as a second direction, the scattered ray removal grid is disposed at a facing position that faces the imaging surface in a posture in which a direction in which the boundary line extends is parallel to the second direction.