MRI Shielding Box Conducting Plate Interference Suppression
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Solution Overview
Problem
Current MRI apparatuses face significant electromagnetic interference from electronic components, limiting complex control operations within the shielding chamber, necessitating separate control systems outside the chamber and restricting operator interaction and image processing capabilities.
Innovation Solution
An electromagnetic interference suppression device comprising a shielding box with a conducting plate, which encloses the control board to form a low impedance current loop, reduces interference and allows for complex control systems within the shielding chamber, enabling operators to perform intricate imaging tasks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If control components are disposed outside the shielding chamber, then electromagnetic interference to MRI signals is reduced, but operator interaction and control operation convenience are worsened
Solution Approach 1:
The control system is segmented into two parts: the control board is placed inside the shielding chamber for direct operator interaction, while the power supply and other interference-generating components are separated outside the chamber. This segmentation allows the control board to benefit from both proximity to the operator and electromagnetic shielding from external interference sources.
Solution Approach 2:
A conducting plate is introduced as an intermediary component between the control board and the shielding chamber wall. This conducting plate serves as an electromagnetic shield that blocks interference from external components while allowing the control board to operate inside the chamber, thus mediating between the need for operator convenience and interference protection.
2Ease of operation
If control components are disposed inside the shielding chamber, then operator interaction is improved, but electromagnetic interference to MRI signals increases
Solution Approach 1:
The control system is segmented into two parts: the control board is placed inside the shielding chamber for direct operator interaction, while the power supply and other interference-generating components are separated outside the chamber. This segmentation allows the control board to benefit from both proximity to the operator and electromagnetic shielding from external interference sources.
Solution Approach 2:
A conducting plate is introduced as an intermediary component between the control board and the shielding chamber wall. This conducting plate serves as an electromagnetic shield that blocks interference from external components while allowing the control board to operate inside the chamber, thus mediating between the need for operator convenience and interference protection.
3Object-affected harmful factors
If a simple control system is used in the shielding chamber, then electromagnetic interference is reduced, but imaging control capability is worsened
Solution Approach 1:
The control system is segmented into two parts: the control board is placed inside the shielding chamber for direct operator interaction, while the power supply and other interference-generating components are separated outside the chamber. This segmentation allows the control board to benefit from both proximity to the operator and electromagnetic shielding from external interference sources.
Solution Approach 2:
A conducting plate is introduced as an intermediary component between the control board and the shielding chamber wall. This conducting plate serves as an electromagnetic shield that blocks interference from external components while allowing the control board to operate inside the chamber, thus mediating between the need for operator convenience and interference protection.
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 solution effectively minimizes electromagnetic interference, allowing for comprehensive control and image processing within the shielding chamber, enhancing operational convenience and reducing the need for frequent operator movement between control and shielding chambers.
Implementation Method 1
the conducting plate being used to carry the interference source board that produces electromagnetic interference
Implementation Method 2
a shielding box and a conducting plate, the shielding box including a plurality of shielding plates, the plurality of shielding plates enclosing a shielding space
Data Source
AI summary
An electromagnetic interference suppression device and an MRI apparatus using such a device are disclosed. The MRI apparatus may include a main magnet, a gradient coil, an RF coil placed in a shielding chamber, a control system, and an electromagnetic interference suppression device.