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Related Experiment Video

Updated: May 30, 2026

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences

Published on: May 17, 2018

Metal-induced artifacts in MRI.

Brian A Hargreaves¹, Pauline W Worters, Kim Butts Pauly

¹Department of Radiology, Lucas Center for Imaging, Rm P270, 1201 Welch Rd, Stanford, CA 94305-5488, USA. bah@stanford.edu

AJR. American Journal of Roentgenology

|August 25, 2011

Summary

Metallic implants in MRI cause significant image artifacts. Careful selection of imaging parameters and advanced techniques can reduce or correct these metal-induced susceptibility artifacts for better image quality.

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Area of Science:

Medical Imaging
Radiology
Biomedical Engineering

Background:

Metallic implants are common in patients undergoing Magnetic Resonance Imaging (MRI).
Metal artifacts significantly degrade image quality and can obscure important diagnostic information.
Understanding the physics of artifact generation is crucial for mitigation.

Purpose of the Study:

To review the fundamental principles of MRI artifact generation caused by metallic implants.
To describe practical techniques for reducing metal artifacts using standard MRI protocols.
To discuss advanced methods for correcting readout- and slice-direction artifacts.

Main Methods:

Review of basic principles of MRI physics related to magnetic susceptibility.
Description of common MRI pulse sequences and parameter adjustments.
Discussion of advanced artifact correction techniques.

Main Results:

Metallic implants induce susceptibility artifacts, leading to signal loss, fat suppression failure, and geometric distortion.
These artifacts result from large resonant frequency shifts caused by metal.
Standard parameter and pulse sequence adjustments can mitigate some artifacts.

Conclusions:

Metal artifacts in MRI are a significant challenge, impacting image quality and diagnostic accuracy.
Basic artifact reduction strategies involve careful selection of MRI parameters and pulse sequences.
Advanced imaging techniques offer further improvements in artifact correction for metallic implants.