MRI Coil With Electronic Component Coupling For Resonance
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Solution Overview
Problem
Current MRI receiving coils face challenges in achieving resonance between transmitted and received MR signals due to dielectric losses and frequency offsets caused by local electric fields, which affect the Signal-to-Noise Ratio (SNR) and image quality, especially when trying to design coils for different body parts of varying sizes.
Innovation Solution
The design incorporates a coil structure with a first and second conductor electrically coupled using an electronic component, such as a capacitor or inductor, to form a transmission line where the electric current can flow back and forth, allowing for adjustable frequency and reduced coil size, enabling resonance without the need for a long transmission line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long transmission line is used to achieve resonance, then resonance frequency can be achieved, but the coil size becomes too large for examining different body parts
Solution Approach 1:
The patent changes the electrical parameters by introducing electronic components (capacitors, inductors) to modify the resonant frequency of the coil without changing its physical dimensions. This allows the same coil structure to achieve resonance at different frequencies suitable for different body parts.
Solution Approach 2:
The patent employs switchable electronic components that can be dynamically configured to adjust the coil's electrical characteristics. This dynamic adjustment enables the coil to adapt its resonant frequency and impedance matching for different examination scenarios without physical reconfiguration.
2Reliability
If electronic components are placed to form resonance, then resonance frequency can be achieved, but local electric fields cause dielectric loss and frequency offset
Solution Approach 1:
The patent uses carefully positioned electronic components as intermediaries to couple the transmission line to the resonant circuit. By placing components at specific locations where electric fields are minimized, the coupling is achieved with reduced dielectric loss and frequency offset.
Solution Approach 2:
The patent applies different electronic components at different locations along the transmission line based on the local electric field distribution. Components are strategically placed in regions with favorable electromagnetic characteristics to minimize losses while achieving the desired resonant frequency.
3Loss of energy
If multiple electronic components are uniformly distributed on the coil, then electric field intensity is reduced, but electric field still exists between components
Solution Approach 1:
The patent extracts the electronic components from a uniform distribution approach and concentrates them at specific strategic locations along the transmission line. This extraction from uniform distribution eliminates unnecessary components while achieving the same or better performance with reduced complexity.
4Adaptability or versatility
If the coil is designed for different body parts, then versatility is improved, but maintaining resonance across different sizes becomes difficult
Solution Approach 1:
The patent designs a universal coil structure with switchable electronic components that can be configured for different resonant frequencies and impedance values. This multi-functional design allows the same physical coil to serve multiple body parts (head, chest, limbs) by electronically adjusting its characteristics rather than requiring separate coils for each application.
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 the intensity of the received MR signal, improves image quality by ensuring resonance, and allows for flexible coil design suitable for different body parts, reducing size and cost while maintaining effective signal reception.
Implementation Method 1
it may be desirable that resonance occurs between the transmitted MR signal and the received MR signal, i.e., a frequency of the transmitted MR signal and a frequency of the received MR signal are the same (i.e., a resonance frequency)
Implementation Method 2
The electronic component may include at least one of a capacitor, an inductor, or a switching circuit
Implementation Method 3
The first conductor and the second conductor may be electrically coupled using an electronic component placed at the at least one first opening or the at least one second opening so that an electric current may flow between the first conductor and the second conductor through the electronic component
Data Source
AI summary
A coil for receiving a magnetic resonance signal is provided. The coil may include a first conductor; and a second conductor electrically coupled to the first conductor. The second conductor may extend along the first conductor. The first conductor may have at least one first opening or the second conductor may have at least one second opening. The first conductor and the second conductor may be electrically coupled using an electronic component placed at the at least one first opening or the at least one second opening so that an electric current flows between the first conductor and the second conductor through the electronic component.