Cascade Local Coil RF Switch for MRI Signal Routing
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Solution Overview
Problem
Existing MRI systems face challenges with multiple local coils due to increased complexity, cost, and patient discomfort from multiple cables and limited system slots, which complicates the use and management of flexible local coils during scanning.
Innovation Solution
A cascade design for local coils with integrated RF switches and connectors allows multiple coils to be connected in series, reducing the number of cables and system slots required, using a single cable and connectors to facilitate easier setup and operation, and enabling flexible selection of coils based on scanning needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple local coils are connected simultaneously to increase imaging coverage and flexibility, then the imaging versatility is improved, but the number of cables and system slots increases causing operational complexity and patient discomfort
Solution Approach 1:
Multiple local coils are merged into a single integrated coil assembly with multiple receiving channels. The coil elements are physically combined and connected to the MRI system through a single cable and connector assembly, eliminating the need for multiple separate cables while maintaining the ability to independently select and use individual coil elements for different imaging regions.
Solution Approach 2:
The integrated coil assembly serves multiple functions by incorporating different types of coil elements (e.g., flexible coils for body imaging, dedicated coils for specific regions) within a single unit. This universal design allows the same physical coil assembly to perform multiple imaging tasks that previously required separate coil devices.
2Adaptability or versatility
If the number of system slots and receiving channels is increased to support multiple local coils, then the compatibility with multiple coil types is improved, but the cost and design complexity of the receiving assembly increases
Solution Approach 1:
The system employs dynamic channel selection where receiving channels are activated or deactivated based on which coil elements are currently being used. The RF switch dynamically routes signals from active coil elements to appropriate receiving channels, allowing the system to adapt its configuration without requiring permanent hardware changes for each coil type.
Solution Approach 2:
The system changes operational parameters (which receiving channels are active, which RF switches are engaged) based on the configuration of connected coil elements. This allows the same physical receiving assembly to support multiple coil types by dynamically adjusting system parameters rather than requiring dedicated hardware for each coil variant.
3Adaptability or versatility
If multiple local coils with long cables are used to improve imaging flexibility, then the imaging coverage is improved, but the patient comfort and operational convenience deteriorate
Solution Approach 1:
Multiple coil elements that would traditionally require separate cables are merged into a single integrated assembly connected by one cable. This reduces cable clutter around the patient and simplifies the setup process while maintaining the flexibility to target different body regions using the integrated coil elements.
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 simplifies the setup and operation of MRI systems by reducing cable clutter, saving space, increasing patient comfort, and allowing for flexible coil selection and redundancy, thereby enhancing operational efficiency and reducing operational complexity.
Implementation Method 1
one RF switch to be added inside a flexible coil, this RF switch enabling RF output signals from each of the various cascaded local coils to be outputted in turn to the MRI system
Data Source
AI summary
A local coil of an MRI system includes at least one cascade output slot, at least one cascade input slot, and at least one RF switch. The at least one RF switch includes a first input signal interface, a second input signal interface, and at least one output signal interface. The first input signal interface is connected to the at least one cascade input slot, the second input signal interface is connected to an RF signal interface of the local coil, and the output signal interface is connected to the at least one cascade output slot. The at least one RF switch is configured to output signals received by the first input signal interface and the second input signal interface from the output signal interface separately.