Braided MRI Metal Components for Eddy Current Suppression

Solution Overview

Problem

Magnetic resonance imaging (MRI) systems face issues with eddy currents induced by metallic components, leading to non-uniform magnetic fields, heat generation, mechanical wear, and noise, which degrade image quality and system performance.

Innovation Solution

Manufacturing MRI components with microstructures having a braided configuration to cancel out eddy currents, using methods like additive manufacturing or sintering, to ensure the components are made of metal and designed to minimize eddy current effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If metallic components are used in MRI systems, then the system can be constructed with durable materials, but eddy currents are induced causing non-uniform magnetic fields and image quality degradation

Engineering Contradiction:

Improvecomponent durabilityVSAvoidimage quality

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent applies segmentation by dividing the metallic component into a composite structure consisting of a metal substrate with embedded microstructures. This segmentation allows the metal to provide mechanical strength while the microstructures (such as holes, grooves, or recesses) interrupt eddy current paths, thereby reducing eddy current effects and maintaining magnetic field uniformity for improved image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite materials by creating a hybrid structure that combines metal with non-conductive features (microstructures). This composite approach allows the component to retain the mechanical properties of metal while the non-conductive microstructures break up continuous current paths, reducing eddy currents and their harmful effects on magnetic field uniformity and image quality.

Inventive Principle:

Principle #40Composite materials

2Strength

If metallic components are used in MRI systems, then structural strength is maintained, but heat generation increases due to eddy currents

Engineering Contradiction:

Improvestructural strengthVSAvoidheat generation

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The patent applies segmentation by dividing the metallic component into a composite structure consisting of a metal substrate with embedded microstructures. This segmentation allows the metal to provide mechanical strength while the microstructures (such as holes, grooves, or recesses) interrupt eddy current paths, thereby reducing eddy current effects and maintaining magnetic field uniformity for improved image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite materials by creating a hybrid structure that combines metal with non-conductive features (microstructures). This composite approach allows the component to retain the mechanical properties of metal while the non-conductive microstructures break up continuous current paths, reducing eddy currents and their harmful effects on magnetic field uniformity and image quality.

Inventive Principle:

Principle #40Composite materials

3Strength

If metallic components are used in MRI systems, then mechanical strength is ensured, but mechanical wear and fatigue failure increase due to cyclical forces from eddy currents

Engineering Contradiction:

Improvemechanical strengthVSAvoidcomponent lifespan

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent applies segmentation by dividing the metallic component into a composite structure consisting of a metal substrate with embedded microstructures. This segmentation allows the metal to provide mechanical strength while the microstructures (such as holes, grooves, or recesses) interrupt eddy current paths, thereby reducing eddy current effects and maintaining magnetic field uniformity for improved image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite materials by creating a hybrid structure that combines metal with non-conductive features (microstructures). This composite approach allows the component to retain the mechanical properties of metal while the non-conductive microstructures break up continuous current paths, reducing eddy currents and their harmful effects on magnetic field uniformity and image quality.

Inventive Principle:

Principle #40Composite materials

4Ease of manufacture

If metallic components are used in MRI systems, then system construction is simplified, but energy consumption increases due to cooling requirements

Engineering Contradiction:

Improvesystem constructionVSAvoidenergy consumption

Core Design Contradiction:

Ease of manufactureVSUse of energy by moving object

Solution Approach 1:

The patent applies segmentation by dividing the metallic component into a composite structure consisting of a metal substrate with embedded microstructures. This segmentation allows the metal to provide mechanical strength while the microstructures (such as holes, grooves, or recesses) interrupt eddy current paths, thereby reducing eddy current effects and maintaining magnetic field uniformity for improved image quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite materials by creating a hybrid structure that combines metal with non-conductive features (microstructures). This composite approach allows the component to retain the mechanical properties of metal while the non-conductive microstructures break up continuous current paths, reducing eddy currents and their harmful effects on magnetic field uniformity and image quality.

Inventive Principle:

Principle #40Composite materials

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 solution results in a more uniform magnetic field, improved image quality, reduced mechanical noise, lower heat generation, and less energy consumption, allowing for the use of lower-cost materials and new geometries.

Implementation Method 1

the changing magnetic field created by MRI induces eddy currents in the metal components

Methodology Applied

Scientific EffectEddy currents: Eddy Currents

Implementation Method 2

the changing magnetic field created by MRI induces eddy currents in the metal components

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS20260063746A1System and method for reducing eddy currents in metallic materials

Publication Date: 2026.03.05 GE PRECISION HEALTHCARE LLC

AI summary

A magnetic resonance imaging (MRI) system includes a plurality of gradient coils positioned about a bore of a magnet. The MRI system also includes a radio frequency coil assembly. The MRI system also includes an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to the RF coil assembly to acquire MRI images of a subject within the bore. The at least one component of the MRI system is manufactured with microstructures having a braided configuration. The microstructures are configured to cancel out eddy currents that are induced in the at least one component by a magnetic field when the MRI system is utilized.