RF Resonator with Segmented Conductor Lines for MRI
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Solution Overview
Problem
Current magnetic resonance imaging (MRI) technologies face challenges in generating strong magnetic fields and producing high-quality images due to limitations in RF resonator design, particularly in the distribution of current and magnetic field formation.
Innovation Solution
The RF resonator incorporates a dielectric substance with an electric conductor and conductor lines featuring open-cut portions arranged in rows, which are spaced to concentrate current flow and enhance magnetic field generation, along with capacitors for impedance matching and resonance control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional RF resonator design is used, then the structure is simple, but the magnetic field strength is insufficient
Solution Approach 1:
The conductor line is divided into multiple segments by introducing open-cut portions, which concentrates current flow in specific regions. This segmentation allows the resonator to generate stronger magnetic fields in target areas without requiring a complete redesign of the entire structure, thus improving magnetic field strength while maintaining reasonable structural complexity
Solution Approach 2:
The open-cut portions are strategically positioned to concentrate current density in specific local regions of the conductor line. This creates localized areas of enhanced magnetic field strength where needed, rather than uniformly increasing complexity throughout the entire resonator structure
2Strength
If current is concentrated to enhance magnetic field, then magnetic field strength improves, but current distribution becomes non-uniform
Solution Approach 1:
The conductor line is segmented into multiple sections by open-cut portions, which controls current flow paths. This segmentation enables the design to achieve both current concentration in specific regions (for strong magnetic fields) and controlled distribution in other regions, balancing field strength enhancement with acceptable current distribution characteristics
3Strength
If open-cut portions are added to concentrate current, then magnetic field generation improves, but manufacturing complexity increases
Solution Approach 1:
The open-cut portions are designed as simple geometric features that can be integrated into the conductor line fabrication process using standard photolithography and etching techniques. This segmentation approach enhances magnetic field generation capability while maintaining compatibility with existing manufacturing processes, minimizing the increase in manufacturing complexity
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 design results in stronger magnetic fields and improved image quality by concentrating current density between open-cut portions, allowing for more effective magnetic field creation and higher frequency response, thus enhancing the performance of MRI apparatuses.
Implementation Method 1
at least one conductor line which is disposed on a second surface of the dielectric substance so as to face the electric conductor and which is provided with a plurality of open-cut portions
Implementation Method 2
a RF resonator may include a dielectric substance which is provided, on one surface thereof, with an electric conductor, and at least one conductor line which is disposed on a second surface of the dielectric substance
Implementation Method 3
The RF resonator may further include at least one capacitor which is electrically connected to the at least one conductor line and the electric conductor
Data Source
AI summary
Disclosed herein are a RF resonator, a RF coil, and a magnetic resonance imaging (MRI) apparatus. The RF resonator includes a dielectric substance which is provided, on one surface thereof, with an electric conductor, and at least one conductor line which is installed on another surface of the dielectric substance so as to face the electric conductor and provided with a plurality of open-cut portions which are disposed in a plurality of rows.