MRI RF Antenna Assembly for Current-Voltage Fault Monitoring
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Solution Overview
Problem
Conventional RF coils in MRI systems are prone to connection failures due to mechanical stress, leading to unreliable performance, misdiagnoses, and increased power consumption, especially in MRI surface coils where efficiency and heat management are critical.
Innovation Solution
A radio frequency antenna assembly with separate control and MR data channels, incorporating a control/processing module, galvanic power supply, and an analysis module for current/voltage detection, enhances reliability and diagnostic capabilities by optimizing communication paths and integrating features like adaptive tuning, environmental sensing, and patient feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RF coils are frequently connected and disconnected for handling and maintenance, then operational flexibility is improved, but connection reliability deteriorates due to mechanical stress and connection failures
Solution Approach 1:
The system is divided into modular components: RF coil elements, connector modules, and control units that can be independently handled and replaced. This segmentation allows flexible assembly and maintenance while maintaining reliable connections through standardized interfaces.
Solution Approach 2:
The system performs preliminary diagnostic actions by continuously monitoring connection status and signal integrity before actual failures occur. This allows proactive maintenance scheduling that minimizes disconnect/reconnect operations, thereby preserving connection reliability while maintaining operational flexibility.
2Device complexity
If a single fiberoptic connection is used for multiple functions (data transfer, control, monitoring), then device complexity is reduced, but diagnostic capability deteriorates when connection failures occur
Solution Approach 1:
The single fiberoptic connection is functionally segmented into separate communication channels: high-speed data transfer channel, control channel, and diagnostic monitoring channel. This allows independent optimization of each function and enables precise fault localization when issues occur, as each channel can be tested and diagnosed separately.
Solution Approach 2:
An intermediary diagnostic module is introduced that continuously monitors the fiberoptic connection status and signal characteristics. This mediator provides detailed feedback about connection health without requiring separate physical connections, maintaining structural simplicity while enhancing diagnostic capability through advanced signal analysis.
3Ease of manufacture
If conventional RF coil designs are used with standard power supply connections, then ease of manufacture is improved, but power consumption increases and heat management becomes problematic
Solution Approach 1:
The power supply system is made dynamic through intelligent power management that adjusts voltage and current delivery based on real-time coil operation status, patient position, and thermal conditions. This dynamic adaptation reduces unnecessary power consumption while maintaining manufacturing simplicity through standard connection interfaces.
Solution Approach 2:
The system dynamically changes electrical parameters (voltage, current, frequency) of the power supply based on operational requirements and thermal feedback. This allows optimal power delivery that minimizes energy waste and heat generation, while the standardized connection interfaces preserve ease of manufacture.
Data Source
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AI summary
The invention relates to a radio frequency antenna assembly (1) for use in a magnetic resonance examination system (2), comprising an antenna element (3), a control/processing module (4) which is coupled to the antenna element (3) and which is configured for controlling the antenna element (3) and for processing MR data received from the antenna element (3), a galvanic power supply line (5) coupled to the control/processing module (4) to supply electrical power to the control/processing module (4), a control/MR data link (6) coupled to the control/processing module (4) for transmitting MR data received from the antenna element (3) and for transmitting control data for controlling the antenna element (3), and an analysis module (7) that comprises a current/voltage detection unit (11) to derive current/voltage characteristics of the control/processing module (4), the galvanic power supply line (5) and/or the control/MR data link (6), and which is configured to derive a functional status of the radio frequency antenna assembly (1) from the current/voltage characteristics. In this way, a RF antenna assembly is provided that addresses the limitations of the prior art, and enhances reliability, diagnostic capabilities, and overall efficiency in MRI systems.