RF Shielding Conduit for MRI Radio Interference Immunity
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Solution Overview
Problem
MRI devices face significant challenges in operating effectively within active RF-magnetic environments due to RF interference, which can lead to inaccurate data and disruptions in medical equipment functionality, and their magnetic fields can interfere with ferromagnetic objects, causing safety hazards and image quality issues.
Innovation Solution
A uniform non-fringing magnetic field resonance device (UNF-MRD) equipped with an RF shielding conduit (RFSC) that provides radio interference immunity by using a conduit with a specific length-to-width ratio and shape, connected in a non-protruding manner to the closure assembly, allowing medical equipment tubing to pass through while shielding RF interference and reducing magnetic field strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an MRI device operates in an active RF-magnetic environment, then it can be used in hospital settings with multiple electronic devices, but RF interference degrades imaging accuracy and disrupts medical equipment functionality
Solution Approach 1:
An RF shielding conduit acts as an intermediary barrier between the MRI device and the external RF-magnetic environment. The conduit selectively blocks harmful RF interference while permitting necessary medical tubing to pass through, enabling the MRI to operate accurately in hospital settings with multiple electronic devices present
Solution Approach 2:
The RF shielding conduit modifies the RF field parameters by blocking specific frequency ranges that cause interference. By changing the electromagnetic field characteristics through the shielding structure, the MRI maintains imaging precision despite the presence of other RF-emitting devices in the environment
2Measurement precision
If the MRI device uses a strong magnetic field for imaging, then imaging quality is improved, but magnetic interference with ferromagnetic objects creates safety hazards
Solution Approach 1:
The harmful magnetic field effects are extracted and contained within the shielding conduit structure. The conduit design allows the MRI to maintain its strong magnetic field for high-quality imaging while removing or containing the fringing magnetic fields that cause dangerous interactions with ferromagnetic objects in the surrounding environment
Solution Approach 2:
The shielding conduit converts the potentially harmful strong magnetic field into a beneficial force by confining it to the imaging region. The same magnetic field strength that could cause interference with ferromagnetic objects is redirected to improve imaging quality within the controlled bore area, while the shielding prevents harmful external magnetic interactions
3Reliability
If an RF shielding structure is added to the MRI device, then RF interference immunity is improved, but the device complexity and structural requirements increase
Solution Approach 1:
The RF shielding conduit employs a flexible shell structure that can be integrated into the existing MRI device architecture. This thin-walled conduit provides effective RF shielding without adding significant structural complexity, maintaining ease of installation and integration while achieving reliable interference immunity
Solution Approach 2:
The shielding conduit serves multiple functions simultaneously: it blocks RF interference, provides a pathway for medical tubing, and structurally integrates with the MRI device housing. This multi-functionality reduces overall device complexity by combining several protective and operational features into a single integrated component
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 UNF-MRD effectively operates within active RF-magnetic environments without interfering with other electronic devices, maintains accurate imaging data, and ensures safety by minimizing magnetic field strength, thus preventing hazardous interactions with ferromagnetic objects.
Implementation Method 1
an RF shielding means for providing radio interference immunity (RII) to the UNF-MRD from RF-electromagnetic environment surrounding the same
Implementation Method 2
uniform non-fringing magnetic field resonance device
Data Source
AI summary
An MRI device and method that reduce radio-frequency (RF) interference and the effect of the MRI's magnet, within an active RF-magnetic environment. The device includes a non-fringing magnetic field resonance MRI device having RF shielding means. The method includes: obtaining a UNF-MRD, and embedding or otherwise connecting an RF shielding means within or to the UNF-MRD to provide the same with a radio interference immunity (RII) from its RF-electromagnetic environment.