Gradient Magnetic Field Power Supply Device for MRI
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Solution Overview
Problem
Existing magnetic resonance imaging (MRI) systems face inefficiencies in power usage due to uneven distribution of electric power to gradient magnetic field coils, leading to insufficient voltage and disrupted current waveforms, which affect image quality and system operation.
Innovation Solution
A gradient magnetic field power supply device that calculates and prioritizes power distribution to channels based on required power levels, ensuring maximum power is allocated to channels with higher demands while maintaining a total power limit, using control circuits and DC/DC converter circuits to adjust power ratios dynamically during imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric power is distributed equally to all gradient magnetic field coil channels, then power distribution is simple and stable, but channels with higher power requirements receive insufficient power leading to voltage drops and waveform disruptions
Solution Approach 1:
The patent implements unequal power distribution where each gradient magnetic field coil channel receives power according to its specific requirements. The power supply device calculates and allocates different power levels to different channels based on their individual characteristics and demands, ensuring that channels with higher requirements receive sufficient power while maintaining overall system reliability.
2Reliability
If maximum power is allocated to a single channel, then that channel operates reliably, but total power consumption exceeds system capacity and other channels suffer from power deficiency
Solution Approach 1:
The patent employs dynamic power allocation where the power supply device continuously monitors and adjusts power distribution to each channel based on real-time requirements. The system calculates the necessary power for each channel and dynamically allocates power within the total system capacity, ensuring optimal power usage without exceeding limits while maintaining reliable operation of all channels.
3Productivity
If power is increased to meet peak demands of all channels simultaneously, then all channels can operate at full capacity, but power supply capacity requirements and cost increase significantly
Solution Approach 1:
The patent applies partial power allocation to each channel based on actual imaging requirements rather than providing full power to all channels simultaneously. The power supply device calculates and distributes power in proportion to each channel's specific needs during different imaging phases, ensuring sufficient imaging capability while avoiding the need for excessive total power supply capacity.
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 approach enhances power use efficiency by ensuring consistent current waveforms and maintaining system operation even when total power requirements exceed initial capacity, thereby improving image quality and extending imaging time.
Implementation Method 1
a gradient magnetic field coil which applies gradient magnetic field to object, the gradient magnetic field coil including a plurality of channels
Data Source
AI summary
A magnetic resonance imaging apparatus according to a present embodiment includes a gradient magnetic field coil and a gradient magnetic field power supply. The gradient magnetic field coil applies gradient magnetic field to an object, the gradient magnetic field coil including a plurality of channels. The gradient magnetic field power supply calculates a required power for each channel, and distributes maximum power to a channel requiring higher power than the required power of other channels with priority to the other channels, the maximum power being a limit value of total power to be supplied to the channels as a whole.