MRI Interference Sensing for Low-Field Signal Noise Suppression
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Solution Overview
Problem
Conventional high-field MRI systems are costly, require large facilities, and have limited accessibility due to their size and high operational costs, while low-field MRI systems face challenges with low signal-to-noise ratio (SNR) that hinder their development for clinical use.
Innovation Solution
A magnetic resonance imaging system with sensors and noise reduction systems to detect and compensate for electromagnetic interference from patients, using electrical conductors and circuitry to suppress and compensate for electromagnetic interference, and a noise reduction system to enhance MR signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-field MRI systems are used to improve image resolution and scan time, then image quality and productivity are improved, but cost and device complexity increase significantly
Solution Approach 1:
The patent changes the magnetic field strength parameter from conventional high-field (1.5T-3T) to ultra-low-field (<0.1T), fundamentally altering the operating regime of the MRI system. This parameter change enables the use of simpler, less expensive components while maintaining diagnostic image quality through advanced signal processing techniques
Solution Approach 2:
The patent replaces complex superconducting magnet systems with simpler permanent magnets or electromagnets operating at ultra-low fields. This substitution eliminates the need for cryogenic cooling systems, complex power supplies, and associated infrastructure, dramatically reducing device complexity and cost
2Manufacturing precision
If high-field MRI systems are deployed to improve image quality, then diagnostic capability is improved, but accessibility and ease of operation worsen due to facility requirements
Solution Approach 1:
The patent employs disposable or easily replaceable RF coils and sensors that can be used in simple, portable scanner environments. These components are designed for ease of deployment and replacement, eliminating the need for permanent installation in specialized facilities and thereby improving accessibility
Solution Approach 2:
The patent creates a dynamic, adaptable imaging system that can be deployed in various settings (clinics, hospitals, remote locations) rather than being fixed in specialized facilities. The system's portability and flexibility allow it to move to where patients need care, dramatically improving accessibility and ease of operation
3Device complexity
If low-field MRI systems are developed to reduce cost and improve accessibility, then device complexity and cost are reduced, but signal-to-noise ratio deteriorates
Solution Approach 1:
The patent introduces advanced signal processing algorithms and noise cancellation techniques as intermediaries between the ultra-low-field signal source and the final image output. These computational intermediaries enhance the weak signals by filtering noise and reconstructing high-quality images from low-SNR raw data
Solution Approach 2:
The patent employs composite sensing approaches combining multiple RF coil elements, gradiometers, and shielding materials to enhance signal detection capability at ultra-low fields. The composite structure of the imaging system integrates multiple components that work together to improve SNR despite the low magnetic field strength
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
Enhances MR signal quality by reducing electromagnetic interference, enabling low-field MRI systems that are more accessible and cost-effective, allowing for point-of-care imaging without the need for specialized facilities.
Implementation Method 1
detect electromagnetic interference introduced by a patient into an imaging region of the MR imaging system
Implementation Method 2
circuitry configured to receive detected electromagnetic interference from the sensor and to suppress and/or compensate for the detected electromagnetic interference
Data Source
AI summary
A magnetic resonance (MR) imaging system, comprising a magnetics system having a plurality of magnetics components configured to produce magnetic fields for performing magnetic resonance imaging, and a sensor configured to detect electromagnetic interference conducted by a patient into an imaging region of the MR imaging system. The sensor may comprise at least one electrical conductor configured for electrically coupling to the patient. The MR imaging system may further comprise a noise reduction system configured to receive the electromagnetic interference from the sensor and to suppress electromagnetic interference in detected MR signals received by the MR imaging system based on the electromagnetic interference detected by the sensor.