Multi-Frequency MRI Receiving Coil for Expanded Field of View
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Solution Overview
Problem
Conventional MRI systems with planar open magnet configurations have limited Field of View (FOV) due to the use of single-frequency receiving coils, which restricts imaging in non-uniform static magnetic fields, making it difficult to image patients with claustrophobia and limiting the imageable region.
Innovation Solution
A receiving coil with a resonance structure that can simultaneously receive MR signals of multiple frequencies, arranged in a planar array, allowing for broader frequency characteristics and enhanced sensitivity across different magnetic resonance frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single frequency receiving coil is used in a planar open magnet MRI apparatus, then the coil structure is simple, but the Field of View (FOV) is limited to a narrow range
Solution Approach 1:
The receiving coil is divided into multiple coil elements, each tuned to a specific frequency corresponding to different regions of the imaging space. This segmentation allows the system to receive MR signals from multiple frequency ranges simultaneously, thereby expanding the Field of View while maintaining manageable individual coil element structures
Solution Approach 2:
The receiving coil system is designed to perform multiple functions by incorporating coil elements that can receive MR signals across a broad frequency range. Each coil element serves the universal function of signal reception but at different frequency bands, enabling the entire system to image a wider area without requiring multiple separate coil systems
2Adaptability or versatility
If the position of the object is not fixed with respect to the static magnetic field magnets, then imaging flexibility is improved, but the static magnetic field strength varies causing frequency variation in MR signals
Solution Approach 1:
The receiving coil system is designed with dynamic frequency coverage capability, allowing it to adapt to varying magnetic field strengths encountered when objects are positioned differently. By incorporating multiple coil elements tuned to different frequencies, the system dynamically adjusts to receive signals across the frequency spectrum, maintaining imaging capability despite magnetic field variations
Solution Approach 2:
The system changes the operational parameters of the receiving coil by using multiple coil elements with different resonant frequencies. This allows the system to accommodate varying magnetic field strengths that result from different object positions, effectively handling the parameter changes without requiring fixed positioning
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
The solution enables a wider Field of View (FOV) by broadening the frequency characteristics of the receiving coil, allowing for effective imaging in non-uniform static magnetic fields and accommodating patients with claustrophobia by ensuring improved sensitivity and image quality across varying magnetic resonance frequencies.
Implementation Method 1
a receiving coil including at least one coil element that can simultaneously receive a magnetic resonance (MR) signal having a plurality of different frequencies
Implementation Method 2
wherein a resonance structure for the plurality of different frequencies is provided in a single plane in the at least one coil element
Data Source
AI summary
In one embodiment, a receiving coil includes at least one coil element that can simultaneously receive a plurality of magnetic resonance signals having different frequencies, wherein a resonance structure for the different frequencies is provided in a single plane in each of the at least one coil element.