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Related Experiment Video

Updated: Mar 2, 2026

Protocol for the Evaluation of MRI Artifacts Caused by Metal Implants to Assess the Suitability of Implants and the Vulnerability of Pulse Sequences
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SU-E-I-69: Magnetic Resonance Metal Artifact Evaluation with Routine Clinical Cardiac Sequences.

D Joyner1, A Rivard1, D Craft1

  • 1University of Mississippi Medical Center, Jackson, MS.

Medical Physics
|May 19, 2017
PubMed
Summary

Gradient-Recalled-Echo (GRE) and TrueFISP cardiac MRI sequences are most susceptible to metal artifacts, while Turbo-Inversion-Recovery-Magnitude (TIRM) is most tolerant. This finding aids in developing specialized cardiac metal protocols.

Keywords:
Image quality assessmentMagnetic resonanceMagnetic resonance imagingMagnetic susceptibilitiesMedical image artifactsMedical image qualityMedical imagingPrion diseasesSpatial analysisVelocity measurement

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Area of Science:

  • Medical Imaging
  • Cardiovascular MRI
  • Biomedical Engineering

Background:

  • Metal implants can cause significant artifacts in cardiac MRI, degrading image quality.
  • Assessing the impact of different MRI pulse sequences on metal susceptibility is crucial for clinical practice.
  • Developing strategies to mitigate metal artifacts is essential for accurate cardiac imaging in patients with implants.

Purpose of the Study:

  • To evaluate and quantify the severity of metal susceptibility artifacts across various cardiac MRI pulse sequences.
  • To compare the performance of different sequences in the presence of metallic objects.
  • To establish a basis for selecting optimal MRI sequences for patients with metallic implants.

Main Methods:

  • Simulated a post-thoracotomy patient with a stainless steel sternal wire on an ACR MRI phantom.
  • Acquired data using five cardiac MRI sequences (TrueFISP, GRE, TSE, TIRM, DBFS) on a 1.5-T Siemens scanner.
  • Quantified image quality degradation by measuring signal loss and spatial deformation using specialized software.

Main Results:

  • Gradient-Recalled-Echo (GRE) and TrueFISP sequences exhibited the largest signal loss and spatial deformation.
  • GRE sequences showed signal drop across 12 slices, compared to 4-5 slices for others.
  • Turbo-Inversion-Recovery-Magnitude (TIRM) demonstrated minimal signal loss and spatial deformation, indicating high metal tolerance.

Conclusions:

  • GRE and TrueFISP are the most susceptible cardiac MRI sequences to metal artifacts.
  • TIRM is the most tolerant sequence, showing minimal impact from metallic objects.
  • Findings support the creation of a dedicated cardiac metal protocol using metal-tolerant sequences to improve imaging efficiency and patient comfort.