MRI Shielding System with Movable Covers for EMI Reduction
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Solution Overview
Problem
Magnetic Resonance Imaging (MRI) devices are susceptible to electromagnetic interference (EMI) from external electrical and electronic devices, which can degrade the imaging quality by affecting the stability and homogeneity of the magnetic fields.
Innovation Solution
A shielding system comprising a shielding layer assembly and a shielding cover assembly is integrated into the MRI device, forming a Faraday cage to shield the device from external electromagnetic waves, with the shielding cover assembly being movable or detachable to adapt to different operating states of the MRI device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding system is added to the MRI device, then electromagnetic interference is reduced, but device complexity increases
Solution Approach 1:
The shielding system is divided into multiple segments: a shielding layer assembly with first and second shielding layers, and a shielding cover assembly with first and second shielding covers. Each segment can be independently installed, adjusted, or removed, reducing the overall complexity of installation and maintenance while providing comprehensive EMI protection throughout the scanning room.
Solution Approach 2:
The shielding layers are disposed on the scanner and supporting component surfaces, with the shielding covers positioned at openings. The shielding covers can be coupled to the shielding layers to form a nested Faraday cage structure, creating multiple layers of protection without requiring a completely separate shielding system.
2Object-affected harmful factors
If a complete shielding enclosure is formed, then electromagnetic shielding effectiveness is improved, but ease of operation deteriorates
Solution Approach 1:
The shielding covers are designed to be movable rather than fixed, allowing them to be opened when patient access is needed and closed during scanning to maintain shielding effectiveness. The guide units and driving components enable smooth opening and closing operations, maintaining ease of use while preserving EMI protection during actual scanning.
Solution Approach 2:
The shielding layers are pre-installed on the scanner and supporting component surfaces, creating a baseline shielding structure. The shielding covers are then positioned at openings to complete the Faraday cage, allowing rapid assembly and disassembly without requiring complex installation procedures each time.
3Ease of manufacture
If fixed shielding structures are used, then manufacturing simplicity is improved, but adaptability deteriorates
Solution Approach 1:
The shielding system is divided into modular segments (shielding layers and shielding covers) that can be independently manufactured and then assembled. This segmentation allows each component to be produced using standard manufacturing processes while the overall system adapts to different MRI device configurations and scanning room layouts.
Solution Approach 2:
The shielding layers can be disposed on various surfaces (scanner, supporting components), and the shielding covers can be positioned at different openings, allowing the same basic shielding structure to adapt to different MRI device types and configurations without requiring custom-designed shielding systems for each application.
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 shielding system effectively reduces electromagnetic interference, thereby enhancing the imaging quality and stability of the MRI device by preventing external electromagnetic waves from interfering with the magnetic fields.
Implementation Method 1
A shielding system comprising a shielding layer assembly and a shielding cover assembly is integrated into the MRI device, forming a Faraday cage to shield the device from external electromagnetic waves
Data Source
AI summary
The present disclosure relates to systems and methods for shielding electromagnetic waves. The system may include an imaging device, a shielding layer assembly disposed on at least a first portion of the imaging device, and a shielding cover assembly disposed on at least a second portion of the imaging device. When the shielding cover assembly is coupled to the shielding layer assembly, the shielding cover assembly and the shielding layer assembly may be combined to form a shielding space that is shielded against electromagnetic waves from an outside of the shielding space.