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[Artifacts in MRT caused by instruments and implants].

Hansjörg Graf1, Ulrike A Lauer, Thomas Klemm

  • 1Sektion für Experimentelle Radiologie, Eberhard-Karls-Universität Tübingen. hansjoerg.graf@med.uni-tuebingen.de

Zeitschrift Fur Medizinische Physik
|October 18, 2003
PubMed
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Metallic implants cause significant magnetic resonance imaging (MRI) artifacts. This survey details how material properties, device geometry, and MRI sequence parameters influence artifact generation and underlying physical mechanisms.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Materials Science

Context:

  • Metallic instruments and implants are prevalent in medical applications.
  • These metallic devices generate significant image artifacts in Magnetic Resonance Imaging (MRI).
  • Understanding these artifacts is crucial for accurate medical diagnoses and treatment planning.

Purpose:

  • To systematically survey the factors influencing metallic artifact generation in MRI.
  • To provide a detailed description of the physical mechanisms behind these artifacts.
  • To guide the selection of optimal MRI sequences and parameters for imaging patients with metallic implants.

Summary:

  • Artifacts in MRI are influenced by material properties and geometric arrangement of metallic devices.

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  • MRI sequence parameters, including echo time, voxel size, and bandwidth, significantly impact artifact severity.
  • The study systematically reviews these interactions and explains the fundamental physics of artifact formation.

    • Impact:

    • Enables improved MRI quality in the presence of metallic implants.
    • Facilitates better diagnostic accuracy for patients with medical devices.
    • Contributes to the development of artifact reduction techniques in MRI.