RF-Shielded Room Peripheral Transmitter Door Sensor Control
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Solution Overview
Problem
Magnetic resonance devices require RF shielding to prevent radiofrequency signal interference, which restricts the operation of peripheral systems that acquire physiological data from examination objects within the shielded environment.
Innovation Solution
A peripheral system with wireless signal transmission is designed to be low-emission by using a door sensor unit to determine the opening status of the RF shield and controlling the transmission of peripheral data accordingly, ensuring that data is only transmitted when the shield is closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless signal transmission is used for peripheral data acquisition, then ease of operation and adaptability are improved, but radio emissions increase requiring separate certification and higher costs
Solution Approach 1:
The peripheral system dynamically adjusts its operation mode based on the door status. When the door is closed, wireless transmission is disabled and only wired connection is used. When the door is open, wireless transmission is enabled. This dynamic adaptation allows the system to maintain ease of operation while controlling radio emissions during specific operational phases.
Solution Approach 2:
The system changes the transmission parameter (wireless vs wired) based on the environmental condition (door open/closed). By switching between different transmission modes depending on the RF shielding status, the system optimizes the balance between operational convenience and radio emission control.
2Adaptability or versatility
If wireless transmission is continuously enabled for peripheral systems, then adaptability and ease of operation are improved, but compliance with radio regulations becomes difficult and costs increase
Solution Approach 1:
The system dynamically switches between wired and wireless transmission modes based on door status. During MR acquisition with door closed, only wired connection is active ensuring regulatory compliance. During preparation phases with door open, wireless transmission is enabled providing adaptability. This dynamic mode switching resolves the contradiction between versatility and compliance.
3Ease of operation
If the RF shield is opened for examination object access, then ease of operation is improved, but radiofrequency signal interference increases
Solution Approach 1:
The door status sensor acts as an intermediary that detects the opening/closing state and triggers the appropriate transmission mode. This intermediary mechanism allows the system to respond automatically to door status changes, enabling easy access when needed while maintaining signal integrity during acquisition.
Solution Approach 2:
The system uses feedback from the door status sensor to automatically adjust the transmission mode. When the door is opened, the sensor detects this and enables wireless transmission. When closed, it switches to wired-only mode. This feedback mechanism ensures the system adapts to environmental changes while maintaining operational ease.
Data Source
AI summary
The disclosure relates to a radio-based physiological acquisition system for an RF-shielded room comprising a peripheral acquisition unit with a peripheral transmitter, a peripheral control unit, and a door sensor unit. The door sensor unit is configured to determine an opening status of a door in an RF shield around the RF-shielded room. The peripheral acquisition unit is configured to switch off the peripheral transmitter depending on the opening status of the door, e.g. when the door is open.