Biopsy Targeting Cube Angled Interface Self-Grounding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biopsy systems lack features that enhance the guide cube's interaction with positioning grid plates, limiting the precision and versatility in guiding biopsy devices to targeted sites within the body, particularly under MRI guidance.
Innovation Solution
The development of guide cubes with various features such as rotatability, self-grounding mechanisms, elastomeric edges and bodies, expanding access ports, and tapered designs that allow for secure fitting within grid plates, enabling precise alignment and secure positioning of biopsy devices during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a guide cube is used with a positioning grid plate for biopsy guidance, then the precision in targeting biopsy sites is improved, but the guide cube may slip or become misaligned during the procedure
Solution Approach 1:
The guide cube incorporates self-grounding features that automatically engage with the positioning grid plate when the cube is inserted. The ground surfaces on the guide cube's interface create friction and mechanical interlocking with the grid plate, causing the cube to self-align and self-secure without requiring additional fastening mechanisms or manual adjustment, thereby maintaining stable positioning throughout the biopsy procedure
Solution Approach 2:
The guide cube utilizes elastomeric materials in its construction, particularly at the interface surfaces that contact the positioning grid plate. These elastomeric portions provide enhanced grip and friction against the grid plate, preventing slippage while allowing for precise positioning. The combination of rigid structural components and flexible elastomeric interface elements creates a composite structure that simultaneously achieves stability and precision
2Reliability
If the guide cube interface is designed for secure fitting with grid plates, then the stability and precision are improved, but the complexity of the guide cube design increases
Solution Approach 1:
The self-grounding interface is designed to automatically engage and secure the guide cube to the positioning grid plate through friction and mechanical interlocking of ground surfaces. This self-securing mechanism eliminates the need for separate fastening devices, clips, or locking mechanisms, thereby achieving reliable positioning without significantly increasing the overall complexity of the guide cube design
Solution Approach 2:
The interface between the guide cube and positioning grid plate utilizes elastomeric materials with specific durometer properties that optimize both grip and ease of insertion. By carefully selecting and controlling the material parameters (such as hardness, elasticity, and friction coefficients), the design achieves reliable secure fitting while maintaining a relatively simple structural configuration that does not require complex mechanical components
3Measurement precision
If the guide cube has fixed orientation features, then the precision in maintaining biopsy device orientation is improved, but the versatility to accommodate different biopsy approaches is reduced
Solution Approach 1:
The guide cube incorporates rotatable features that allow the cube to be rotated to different orientations while maintaining secure engagement with the positioning grid plate. The self-grounding interface and elastomeric edges provide consistent securing force regardless of the cube's rotational position, enabling the system to adapt to different biopsy approaches and angles while maintaining precise orientation control for each specific approach
4Ease of manufacture
If the guide cube uses standard interface dimensions, then the ease of manufacture is improved, but the compatibility with different grid plate designs is reduced
Solution Approach 1:
The elastomeric edges and elastomeric body portions of the guide cube are designed with specific dimensional parameters and material properties that allow the cube to accommodate variations in grid plate opening sizes. The elastomeric material can compress and deform to fit different dimensions while maintaining a secure interface, enabling compatibility with multiple grid plate designs without requiring custom manufacturing for each variant
Solution Approach 2:
The guide cube utilizes a composite construction combining rigid structural elements with flexible elastomeric interface components. The elastomeric portions provide adaptability to different grid plate dimensions and designs, while the rigid core maintains structural integrity and guide hole positioning. This composite approach allows a single guide cube design to be manufactured with standard processes while achieving broad compatibility across different grid plate variants
Data Source
AI summary
A biopsy system comprises a control module, a localization assembly, a biopsy device, and a targeting cube. The biopsy device comprises a probe and other components, which selectively couple with a targeting cube that is configured to selectively couple with a grid plate having apertures for receiving the targeting cube. The targeting cube comprises a body defined by faces. The targeting cube further comprises guide holes that originate and terminate at the faces and pass through the body of the targeting cube to provide passageways through the targeting cube. The faces of the targeting cube comprise a tapered profile from a proximal end to a distal end. The tapered profile of the targeting cube may be created by the faces themselves or by protruding elements from the faces. The body of the targeting cube and/or the protruding elements may be at least partially comprised of an elastomeric material.