MRI Biopsy Targeting Cube Eccentric Lock
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Solution Overview
Problem
Current biopsy systems lack a guide cube with enhanced features for improved positioning and secure attachment to positioning grid plates, which can lead to inaccuracies and difficulties in targeting biopsy sites during medical procedures.
Innovation Solution
The development of MRI-compatible biopsy systems that include guide cubes with rotatable axes, self-grounding features, and eccentric locks with elastomeric or ceramic components for secure positioning within grid plates, allowing for precise alignment and secure attachment during procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide cube is inserted into a positioning grid plate for biopsy targeting, then the biopsy site can be targeted, but the guide cube may become loose or misaligned during the procedure
Solution Approach 1:
The guide cube is divided into functional segments including a body portion, locking mechanism, and interface features that can independently perform positioning, locking, and alignment functions, allowing each segment to be optimized for its specific purpose while working together as a unified system
Solution Approach 2:
The guide cube incorporates pre-configured locking mechanisms and alignment features that are prepared in advance, allowing the cube to be quickly and securely attached to the positioning grid plate without requiring complex assembly procedures during the biopsy procedure
2Adaptability or versatility
If the guide cube allows rotation for multiple guide positions, then versatility is improved, but the positioning precision may be compromised
Solution Approach 1:
The guide cube incorporates a rotatable mechanism that allows the cube to be positioned at multiple predetermined angular orientations (e.g., 0°, 45°, 90°, 135°), providing versatility for different biopsy approaches while maintaining precision through defined stopping positions and alignment features
Solution Approach 2:
The guide cube serves as an intermediary component between the positioning grid plate and the biopsy needle, providing multiple guide hole orientations that can accommodate different needle approaches while maintaining accurate targeting through its structured rotation mechanism
3Reliability
If an eccentric lock mechanism is used to secure the guide cube, then attachment security is improved, but the device complexity increases
Solution Approach 1:
The eccentric lock mechanism utilizes an off-center rotating element that creates asymmetric engagement with the positioning grid plate, allowing a single rotational motion to securely lock the guide cube in place while maintaining a relatively simple overall structure
Solution Approach 2:
The eccentric lock mechanism is designed to be self-securing, where the rotation of the eccentric element automatically creates the locking action through its geometric relationship with the positioning grid plate, eliminating the need for additional locking components or complex assembly procedures
Data Source
AI summary
A biopsy system comprises a control module, a localization assembly, a biopsy device, and a targeting cube. A probe and/or other associated components of the biopsy device are configured to selectively couple with the targeting cube, which is configured to selectively couple with a grid plate. The targeting cube may comprise an eccentric lock for securing the targeting cube within the grid plate. The targeting cube may further comprise an elastomeric insert positioned within guide holes of the targeting cube for securing the probe and/or other associated components within the guide hole of the targeting cube. The guide holes of the targeting cube may alternatively, or in addition, include an elastomeric retaining ring within the passageway of the guide hole.