Multinuclear MRI RF Coil with Segmented Resonator Elements
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Solution Overview
Problem
Current MRI systems cannot simultaneously acquire MR signals at different resonance frequencies, leading to limitations in molecular imaging and diagnostics due to the need for elaborate switching electronics, which can affect signal quality and reliability.
Innovation Solution
An MR device with a plurality of independently tuneable resonator elements, each connected to separate signal transmission and reception channels, allowing simultaneous operation at multiple resonance frequencies, eliminating the need for intricate switching electronics and enabling parallel acquisition of MR images and spectroscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a switchable multi-layer coil with electronic switches is used to detect multiple nuclear species, then the resonance frequency can be changed, but simultaneous acquisition at different frequencies is not possible and signal quality deteriorates due to switching electronics
Solution Approach 1:
The RF coil arrangement is divided into multiple independent resonator elements, each tuned to a specific resonance frequency. Each resonator element has its own separate transmission and reception channels, eliminating the need for switching electronics. This segmentation allows simultaneous operation at multiple frequencies without signal degradation from switching components.
2Adaptability or versatility
If a switchable multi-layer coil with elaborate switching electronics is used, then multiple nuclear species can be detected, but device complexity increases and system reliability decreases
Solution Approach 1:
The system is segmented into multiple independent resonator elements with dedicated transmission and reception channels for each frequency. This eliminates the need for complex switching electronics that would be required to multiplex signals from a single coil, thereby reducing device complexity while maintaining multi-nuclear species detection capability.
Solution Approach 2:
Each resonator element is designed to be independently tunable and can operate at its designated frequency for detecting different nuclear species. The modular design allows the same basic resonator structure to be universally applied across multiple frequency channels, reducing overall system complexity.
3Device complexity
If sequential acquisition at different resonance frequencies is performed, then device complexity is reduced, but time consumption increases and data registration accuracy deteriorates during patient movement
Solution Approach 1:
Multiple resonator elements operate simultaneously and continuously at different resonance frequencies, allowing parallel acquisition of data from different nuclear species. This eliminates the time loss associated with sequential switching between frequencies, as all frequency channels are active at the same time.
4Device complexity
If sequential acquisition at different resonance frequencies is performed, then device complexity is reduced, but measurement precision deteriorates due to patient movement between acquisitions
Solution Approach 1:
By operating multiple resonator elements simultaneously at different frequencies, the system captures data from all nuclear species during the same time window. This eliminates registration errors that would occur with sequential acquisition when patient movement occurs between separate acquisition periods, thereby maintaining high measurement precision.
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 real-time simultaneous imaging and spectroscopy at different resonance frequencies, improving signal strength and image resolution, and simplifying data registration, while reducing the risk of incorrect data registration during patient movement.
Implementation Method 1
a main magnet for generating a stationary and substantially homogeneous main magnetic field in the examination volume
Implementation Method 2
an RF coil arrangement for generating RF fields in the examination volume... The adjacent resonator elements are alternately tuned to one of at least two different MR resonance frequencies
Implementation Method 3
each resonator element is associated with a separate signal transmission and/or signal reception channel of the MR device
Data Source
AI summary
A magnetic resonance (MR) device for magnetic resonance imaging of a body placed in an examination volume includes a main magnet or generating a stationary and substantially homogeneous main magnetic field in the examination volume, and an RF coil arrangement for generating RF fields in the examination volume and/or for receiving MR signals from the body. In order to provide such an MR device, which is arranged to operate at the resonance (Larmor) frequencies of two or more different nuclear species at the same time, the RF coil arrangement includes independent resonator elements which are adjacently arranged in or near the examination volume. The adjacent resonator elements are alternately tuned to one of two or more different MR resonance frequencies, and each resonator element is associated with a separate signal transmission and/or signal reception channel of the MR device.