Tilted Compression Member for Biopsy Stability
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Solution Overview
Problem
During lateral approach biopsy procedures, the compressed target object tends to be positionally displaced due to uniform pressure distribution, leading to increased stress and potential inaccuracies in sampling needle insertion.
Innovation Solution
A radiographic image capturing apparatus with a compression member that is tilted with respect to the holding member along lateral directions, distributing pressure unevenly to prevent positional displacement, allowing for accurate needle insertion and reduced stress on the target object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If uniform pressure is applied to compress the target object during lateral approach biopsy, then the target object is held stable, but the target object becomes positionally displaced when the sampling needle is inserted
Solution Approach 1:
The compression member is tilted at a specific angle (e.g., 10-20 degrees) relative to the image capturing base, creating non-uniform pressure distribution across the target object. This local variation in compression force prevents positional displacement during needle insertion while maintaining overall stability, as the uneven pressure creates resistance against displacement forces without requiring excessive overall compression.
Solution Approach 2:
The compression member is designed with asymmetric orientation (tilted configuration) rather than symmetric parallel alignment with the image capturing base. This asymmetric arrangement generates differential pressure zones that counteract the displacement forces generated during lateral needle insertion, thereby maintaining positional accuracy while preserving stability.
2Manufacturing precision
If increased pressure is applied to prevent positional displacement during lateral approach biopsy, then positional accuracy is maintained, but the burden on the target object increases
Solution Approach 1:
By tilting the compression member, the system creates localized high-pressure zones only in specific areas where needed to prevent displacement, rather than applying high pressure uniformly across the entire target object. This reduces the overall burden and stress on the target object while maintaining positional accuracy during the biopsy procedure.
Solution Approach 2:
The asymmetric, tilted configuration of the compression member distributes pressure non-uniformly, concentrating stabilizing forces where most needed to prevent displacement during needle insertion. This asymmetric pressure distribution achieves positional accuracy with lower overall pressure requirements, thereby reducing stress and harmful effects on the target object.
3Manufacturing precision
If the compression member is tilted to distribute pressure unevenly, then positional displacement is prevented, but the device complexity increases
Solution Approach 1:
The compression member is simply tilted at a fixed angle relative to the image capturing base, creating an asymmetric configuration that prevents positional displacement. This straightforward geometric modification achieves the desired effect without requiring complex control systems, multiple actuators, or sophisticated mechanisms, thereby minimizing the increase in device complexity.
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 uneven pressure distribution effectively prevents positional displacement of the target object during biopsy, ensuring accurate sampling and reducing the need for excessive compression pressure, thereby minimizing stress on the object.
Implementation Method 1
a radiation source for applying radiation to a target object to be examined, a radiation detector for detecting radiation that has passed through the target object and for converting the detected radiation into a radiographic image
Data Source
AI summary
A radiographic image capturing apparatus includes a compression member, which is displaceable with respect to a holding member that holds a target object to be examined. The compression member is displaced toward the holding member for compressing the target object held by the holding member while the compression member is tilted with respect to the holding member along lateral directions of the target object as viewed in front elevation.