Configurable RF Coil Assembly for MRI via Switched Segments
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Solution Overview
Problem
Conventional MRI RF coil assemblies have fixed configurations, making it difficult to achieve all desired imaging parameters simultaneously, such as imaging penetration, speed, and signal-to-noise ratio, as they cannot be easily adjusted.
Innovation Solution
A configurable RF coil assembly with an array of conductive segments coupled via switches, allowing for the formation of different RF coil element configurations by selectively activating subsets of switches to achieve various contour topologies, enabling the adjustment of RF coil element geometry and number based on specific imaging requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RF coil assemblies use fixed configurations, then manufacturing and operation are simple, but imaging parameters such as penetration, speed, and signal-to-noise ratio cannot be optimized simultaneously
Solution Approach 1:
The RF coil assembly is divided into multiple individually controllable RF coil elements, each with independent switching capability. This segmentation allows selective activation of specific coil elements based on imaging requirements, enabling optimization of imaging parameters without requiring complete redesign of the entire coil assembly.
Solution Approach 2:
The RF coil assembly transitions from a static fixed configuration to a dynamic reconfigurable system. Switching mechanisms enable real-time or protocol-based reconfiguration of coil element arrangements, allowing the system to adapt its geometry and characteristics to match different imaging protocols and anatomical regions.
2Adaptability or versatility
If multiple RF coil assemblies are used to achieve different imaging parameters, then imaging flexibility improves, but device complexity and cost increase
Solution Approach 1:
A single RF coil assembly is designed to perform multiple functions by incorporating reconfigurable elements that can be arranged in different geometries and configurations. This multi-functionality allows one universal coil assembly to replace what would traditionally require multiple specialized coil assemblies for different imaging protocols and anatomical regions.
3Ease of operation
If RF coil elements are fixed in place, then structural stability is maintained, but adaptability to different imaging requirements is limited
Solution Approach 1:
The system enables changes in geometric parameters of the RF coil elements through reconfiguration, while maintaining electrical and mechanical stability. By carefully designing the switching mechanisms and connection architectures, the system achieves parameter adaptability without compromising the reliability and signal quality required for high-quality imaging.
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
Enables the generation of multiple effective RF coil configurations from a single assembly, improving image quality by optimizing imaging parameters such as signal-to-noise ratio, acceleration, and penetration for different patients and anatomies, while reducing the need for multiple coil assemblies.
Implementation Method 1
As the nuclear spins relax back to their rest energy state, they release the absorbed energy in the form of an RF signal. This RF signal (or MR signal) is detected by one or more RF coil assemblies and is transformed into the image using reconstruction algorithms.
Data Source
AI summary
Various systems are provided for magnetic resonance imaging (MRI). In one example, a method includes selecting a contour topology for operating a configurable radio frequency (RF) coil assembly, wherein the configurable RF coil assembly includes an array of conductive segments coupled via a plurality of switches, and the contour topology defines a configuration of one or more RF coil elements formed on the configurable RF coil assembly. The method further includes, during a receive mode, at least partially activating one or more subsets of switches of the plurality of switches according to the selected contour topology to form the one or more RF coil elements.