Non-magnetic Needle Manipulator RF-coil Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional needle placement manipulators for MRI-guided interventions face challenges in precise positioning due to interference with RF-coils and require multiple steps for setup, limiting clinician workspace and increasing procedure time, while also needing to be non-magnetic to avoid disrupting the MRI magnetic field.
Innovation Solution
A needle placement manipulator with a guide system and RF-coil attachment that allows precise positioning of the needle holder using rotary guides with a base body that can be securely fastened to the patient, minimizing interference with the RF-coil and enabling efficient needle placement with minimal steps, utilizing non-magnetic materials to maintain MRI field homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a needle placement manipulator is used for MRI-guided interventions, then needle positioning accuracy is improved, but the manipulator interferes with the RF-coil and disrupts the MRI magnetic field
Solution Approach 1:
The manipulator is constructed entirely from non-magnetic materials, fundamentally changing the magnetic properties of the device to eliminate interference with the MRI magnetic field while maintaining structural integrity and positioning accuracy
Solution Approach 2:
An attachment mechanism serves as an intermediary between the manipulator and RF-coil, allowing the manipulator to be securely mounted on the RF-coil without direct contact between magnetic components, thus preventing field disruption
2Ease of operation
If conventional needle placement manipulators are used, then needle positioning can be performed, but multiple setup steps are required which limit clinician workspace and increase procedure time
Solution Approach 1:
The manipulator and RF-coil are merged into a single integrated unit through the attachment mechanism, eliminating the need for separate positioning and mounting steps, thereby reducing procedure time and improving workspace efficiency
Solution Approach 2:
The attachment mechanism provides multi-functionality by enabling secure mounting of the manipulator to the RF-coil while simultaneously maintaining clinician access to the patient through the RF-coil opening, consolidating multiple functions into a single component
3Stability of the object's composition
If the manipulator is securely fastened to the patient, then positioning stability is improved, but the setup process becomes more complex
Solution Approach 1:
The attachment mechanism is pre-configured with alignment features and fastening components that guide the mounting process, allowing the manipulator to be securely attached to the RF-coil in a standardized, simplified sequence that maintains positioning stability without increasing perceived complexity
Data Source
AI summary
A needle placement manipulator includes, a needle holder configured to hold a needle, a guide system configured to position the needle holder to a predetermined direction with respect to a subject of needle placement, an attachment including an attaching portion to which the guide system is attached and a setting portion on which an RF-coil is set. A base surface of the setting portion is configured to be disposed on the subject.