MRI Biopsy Guide Cube with Gripping Arms
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Solution Overview
Problem
Current biopsy systems lack features that enhance the guide cube's functionality with positioning grid plates, particularly in terms of precision and stability during MRI-guided procedures, which can affect the accuracy and ease of targeting biopsy sites within the breast tissue.
Innovation Solution
The development of MRI-compatible biopsy systems that incorporate a control module, localization assembly, and guide cubes with rotatable and self-grounding features, along with gripping arms, to improve the precision and stability of needle insertion and tissue sampling, allowing for various guide positions and angles of penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a guide cube is used with a positioning grid plate, then the biopsy targeting precision is improved, but the device complexity increases due to additional components like gripping arms and rotatable mechanisms
Solution Approach 1:
The gripping arms are integrated into the guide cube structure, with the arms forming part of the cube's body rather than being separate components. This nesting approach allows the guide cube to maintain its targeting precision function while reducing overall device complexity by eliminating the need for separate mounting mechanisms.
Solution Approach 2:
The guide cube incorporates rotatable mechanisms that allow dynamic adjustment of the cube's orientation and the gripping arms' positions. This dynamic capability enables precise targeting of biopsy sites from multiple angles while keeping the device design efficient through standardized rotational joints rather than complex multi-axis positioning systems.
2Stability of the object's composition
If gripping arms are added to the guide cube, then the stability of needle insertion is improved, but the ease of operation decreases due to additional manual manipulation required
Solution Approach 1:
The gripping arms are pre-positioned in an open state that automatically allows the guide cube to be placed onto the positioning grid plate without manual manipulation. Once positioned, the arms automatically engage with the grid plate's features to secure the cube, eliminating the need for operators to manually adjust the arms during the procedure.
Solution Approach 2:
The gripping arms are designed with spring-loaded or elastic mechanisms that automatically open to allow insertion of the guide cube and then automatically close to grip the positioning grid plate. This self-service mechanism provides stable needle insertion support while requiring minimal manual operation from the user.
3Adaptability or versatility
If the guide cube is made rotatable, then the adaptability for various guide positions is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The guide cube incorporates rotatable mechanisms that allow dynamic adjustment of the cube's orientation and the gripping arms' positions. This dynamic capability enables precise targeting of biopsy sites from multiple angles while keeping the device design efficient through standardized rotational joints rather than complex multi-axis positioning systems.
Solution Approach 2:
The rotation mechanism is divided into discrete angular positions (e.g., 0°, 45°, 90°, 135°) with corresponding indexing features on the positioning grid plate. This segmentation approach provides versatile adaptability for different biopsy targeting angles while maintaining manageable manufacturing precision requirements through standardized angular increments.
Data Source
AI summary
A biopsy system comprises a control module, a localization assembly, a biopsy device, and a targeting cube. The biopsy device and/or other associated components are configured to selectively couple with a targeting cube that selectively couples 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. To securely and removably fit the targeting cube within a grid plate aperture, the targeting cube also comprises a pair of gripping arms. The gripping arms extend from two opposing faces of the cube and snap fit around the walls of the grid plate to secure the targeting cube in position. The arms are resiliently biased to engage the grid plate.