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Condensation Artifact.

Xiaohong Joe Zhou1,2,3,4, Michael P Flannery1, Hagai Ganin1

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A new brain imaging artifact, termed condensation artifact, was identified in COVID-19 patients. It is caused by condensed water droplets in the head coil due to mask-induced changes in breathing patterns.

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Area of Science:

  • Radiology
  • Medical Imaging
  • COVID-19 Research

Background:

  • The COVID-19 pandemic necessitated modified imaging protocols, including mask usage during MRI scans.
  • Brain imaging is crucial for monitoring neurological complications associated with COVID-19.

Observation:

  • A hyperintense signal artifact was frequently observed on brain MRI scans.
  • This artifact appeared as bright spots superior or lateral superior to the skull.
  • It was particularly noted in patients with higher body weight or increased respiratory rate.

Findings:

  • The artifact is caused by condensed water droplets forming within the head coil.
  • Altered moisture flow patterns from mask-wearing patients during exhalation lead to droplet condensation.
  • The artifact is most prominent on T2-weighted sagittal and coronal views but can appear axially.

Implications:

  • Understanding the cause of this condensation artifact is vital for accurate MRI interpretation in COVID-19 patients.
  • Implementing preventative strategies can improve image quality and diagnostic reliability.
  • This finding highlights the impact of external factors, like mask-wearing, on neuroimaging quality.