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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Motion artifacts in MRI: A complex problem with many partial solutions.

Maxim Zaitsev1, Julian Maclaren1,2, Michael Herbst1,3

  • 1Department of Radiology, University Medical Centre Freiburg, Freiburg, Germany.

Journal of Magnetic Resonance Imaging : JMRI
|January 30, 2015
PubMed
Summary
This summary is machine-generated.

Subject motion causes artifacts in magnetic resonance imaging (MRI). While many tools exist to correct these issues, a combination of methods is needed for effective motion artifact mitigation in clinical MRI.

Keywords:
MRImotion artifactmotion correctionmotion preventionreview

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Area of Science:

  • Medical Imaging
  • Biophysics

Background:

  • Subject motion is a significant source of artifacts in clinical magnetic resonance imaging (MRI).
  • These motion-induced artifacts degrade image quality and can hinder accurate diagnosis.
  • Despite decades of research, a universal solution for motion artifacts remains elusive.

Purpose of the Study:

  • To review the origins of motion artifacts in MRI.
  • To present current methods for mitigating and correcting motion artifacts.
  • To emphasize the underlying physics of artifact generation for improved detection and correction.

Main Methods:

  • Review of existing literature on MRI motion artifacts.
  • Explanation of the physical principles causing motion artifacts.
  • Categorization and discussion of current artifact mitigation and correction techniques.

Main Results:

  • Motion artifacts are a frequent and problematic issue in MRI.
  • A diverse "toolbox" of methods exists for motion artifact correction, with varying effectiveness.
  • No single method universally corrects all types of motion artifacts.

Conclusions:

  • A multifaceted approach, utilizing a combination of correction tools, is essential for addressing MRI motion artifacts.
  • Further development of specialized tools is needed for specific clinical situations.
  • Understanding the physics of artifact generation is key to effective detection and mitigation in clinical practice.