Magnetic Resonance Tomography Interference Suppression With Source Detection

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Solution Overview

Problem

Magnetic resonance tomography units face challenges in effectively suppressing electromagnetic interference from electronic components, leading to image artifacts and reduced signal-to-noise ratio due to complex shielding cabins.

Innovation Solution

An electronic apparatus with a detector for identifying interference sources and a signal output to communicate interference information to the magnetic resonance tomography unit, allowing for real-time suppression or correction during image acquisition, using shields and machine learning to minimize interference effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If complex shielding cabins are installed around the magnetic resonance tomography unit, then external interference signals are reduced, but device complexity and cost increase

Engineering Contradiction:
Improveexternal interference signalsVSAvoidshielding cabin structure
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent extracts the interference suppression function from the physical shielding cabin and relocates it to the signal processing domain. Sensors detect interference signals, which are then processed and subtracted from the magnetic resonance signals computationally, eliminating the need for complex physical shielding structures.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the mechanical/physical shielding cabin with an electronic signal processing system. Instead of using physical barriers to block interference, the system uses electronic sensors and computational algorithms to identify and remove interference from the signals.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Object-generated harmful factors

If shielding cabins are installed to reduce emissions, then radio wave emissions are reduced, but device complexity and space requirements increase

Engineering Contradiction:
Improveradio wave emissionsVSAvoidshielding cabin space
Core Design Contradiction:
Object-generated harmful factorsVSVolume of stationary object

Solution Approach 1:

The patent extracts the emission control function from the physical shielding cabin and implements it through electronic monitoring and suppression. Sensors detect emitted radio waves, and the system computationally suppresses these emissions, replacing the need for large physical shielding structures.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent changes the approach from physical containment to electronic parameter control. By monitoring and adjusting signal parameters through electronic means, the system achieves emission reduction without requiring additional physical space for shielding cabins.

Inventive Principle:
Principle #35Parameter changes

3Measurement precision

If sensors are placed close to electronic components for interference detection, then interference detection accuracy improves, but electromagnetic interference from components increases

Engineering Contradiction:
Improveinterference detection accuracyVSAvoidelectromagnetic interference
Core Design Contradiction:
Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent introduces specialized sensors as intermediaries between the electronic components and the detection system. These sensors are designed to detect interference fields while being minimally affected by the components' emissions, allowing accurate detection without requiring excessive proximity that would increase interference exposure.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct physical proximity-based detection with field-based detection using specialized sensors. Instead of placing detectors extremely close to components (which would increase interference exposure), the system uses sensors that can detect interference fields at optimal distances, substituting mechanical proximity with electromagnetic field sensing.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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

Effectively suppresses electromagnetic interference, enhancing image quality by reducing artifacts and improving signal-to-noise ratio without the need for extensive shielding.

Implementation Method 1

a sensor (70) arranged in the immediate vicinity of a source of an electromagnetic interference field (60)... The sensor (70) is configured to detect electromagnetic interference fields

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

The sensor (70) and the source (60) are at least partially surrounded by a shield (54)

Methodology Applied
Scientific EffectElectromagnetic shielding: Faraday Cage

Data Source

PatentUS12429542B2Apparatus and method for interference suppression in a magnetic resonance tomography unit
Publication Date: 2025.09.30 SIEMENS HEALTHINEERS AG
  • US12429542B2 patent drawing
  • US12429542B2 patent drawing
  • US12429542B2 patent drawing

AI summary

The disclosure relates to an electronic apparatus for a magnetic resonance tomography unit, a system including an electronic apparatus, a magnetic resonance tomography unit, and a method for operation. The apparatus has a detector for detecting a source of interference. The detected signal interferes with image acquisition.