Wireless MRI Coil Power Control via Signal Detection
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Solution Overview
Problem
The existing magnetic resonance apparatuses face challenges in efficiently managing battery power for wireless transmission units, leading to frequent battery recharging due to the difficulty in operating the power switch within the imaging space.
Innovation Solution
A magnetic resonance apparatus with a receiving coil, a resonance signal transmitting unit, an extracting unit, a battery, a switch unit, and a control unit that wirelessly transmits startup and stop signals to control the power supply to the transmitting unit, allowing for efficient on/off switching of the power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the transmitting unit is turned off when not used, then battery waste is avoided, but it becomes troublesome to operate the switch in the imaging space
Solution Approach 1:
The transmitting unit automatically turns on and off based on reception of magnetic resonance signals without requiring manual switch operation. The unit self-manages its power state by detecting signal presence, eliminating the need for user intervention while preventing battery waste.
Solution Approach 2:
The transmitting unit uses feedback from magnetic resonance signal detection to control its power state. When signals are detected, the unit remains powered; when no signals are present, it automatically powers down, creating a closed-loop control system that optimizes battery usage.
2Ease of operation
If the transmitting unit remains on continuously, then operation is simple, but the battery is wasted and requires frequent recharging
Solution Approach 1:
The transmitting unit operates periodically rather than continuously, activating only during periods when magnetic resonance signals are present and remaining off during idle periods. This periodic operation maintains simplicity for users while dramatically reducing battery consumption.
3Ease of operation
If wireless transmission is implemented, then cable obstruction is eliminated, but battery management becomes complex
Solution Approach 1:
The wireless transmitting unit automatically manages its own power consumption by detecting magnetic resonance signals and adjusting its operational state accordingly. This self-service capability eliminates the need for complex external battery management systems or manual user intervention.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively avoids battery waste by ensuring the power supply is only active during signal reception, reducing the need for frequent recharging.
Implementation Method 1
a receiving coil which receives a magnetic resonance signal from a subject
Implementation Method 2
a resonance signal transmitting unit which transmits the magnetic resonance signal received by the receiving coil with a radio signal of a frequency band different from that of the magnetic resonance signal
Data Source
AI summary
A magnetic resonance apparatus includes a coil which receives a magnetic resonance signal from a subject, a transmitting unit which transmits the magnetic resonance signal received by the coil with a radio signal of a frequency band different from that of the magnetic resonance signal, an unit which extracts the magnetic resonance signal from the radio signal, a battery which supplies power to the transmitting unit, a switch unit which turns on and off power supply from the battery to the transmitting unit, a unit which wirelessly transmits a startup signal and a stop signal, a receiving unit which receives the startup signal and the stop signal that have been wirelessly transmitted, and a unit which controls the switch unit to turn on the power supply when the receiving unit receives the startup signal and turn off the power supply when the receiving unit receives the stop signal.