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Related Experiment Videos

Magnetic susceptibility artifacts in gradient-recalled echo MR imaging.

L F Czervionke1, D L Daniels, F W Wehrli

  • 1Department of Radiology, Medical College of Wisconsin, Froedtert Memorial Lutheran Hospital, Milwaukee.

AJNR. American Journal of Neuroradiology
|November 1, 1988
PubMed
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Magnetic susceptibility artifacts distort bone contours on gradient-recalled echo MRI, potentially worsening the appearance of spinal stenosis. This study investigated these artifacts in a phantom and in patients with cervical spondylosis.

Area of Science:

  • Medical Imaging
  • Biophysics

Background:

  • Gradient-recalled echo (GRE) MRI sequences are susceptible to magnetic susceptibility artifacts.
  • Differences in magnetic susceptibility between bone and soft tissue are a primary cause of these artifacts, especially with longer echo delay times.

Purpose of the Study:

  • To investigate the impact of magnetic susceptibility artifacts on GRE images.
  • To assess how these artifacts affect the depiction of spinal canal morphology and spinal stenosis in cervical spondylosis.

Main Methods:

  • A phantom model was used to study the effects of magnetic susceptibility artifacts.
  • Results from the phantom model were correlated with magnetic resonance (MR) images from patients with cervical spondylosis.

Main Results:

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  • Magnetic susceptibility artifacts cause spatial distortion and artificial enlargement of bone contours on GRE images.
  • These distortions can alter the perceived shape of the spinal canal.
  • The degree of spinal stenosis may be artifactually exaggerated in patients with cervical spondylosis.

Conclusions:

  • Magnetic susceptibility artifacts are a significant confounder in GRE imaging of the spine.
  • Awareness of these artifacts is crucial for accurate interpretation of spinal canal morphology and stenosis, particularly in conditions like cervical spondylosis.