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Reliable Acquisition of Electroencephalography Data during Simultaneous Electroencephalography and Functional MRI
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Reliable Acquisition of Electroencephalography Data during Simultaneous Electroencephalography and Functional MRI

Published on: March 19, 2021

A new EEG artifact specific to digital acquisition.

Douglas Maus1

  • 1Department of Neurology, State University of New York Downstate Medical Center, Brooklyn, New York, USA. douglas.maus@gmail.com

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|February 5, 2013
PubMed
Summary

A new digital artifact in electroencephalography (EEG) mimics epileptiform activity due to 50-millisecond interval repetitions. This artifact can lead to misdiagnosis, highlighting the need for awareness among electroencephalographers and vendors.

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Area of Science:

  • Neuroscience
  • Medical Technology
  • Digital Signal Processing

Background:

  • Electroencephalography (EEG) is crucial for diagnosing neurological disorders.
  • The shift to digital EEG systems introduces novel artifact types.
  • Misinterpretation of artifacts can lead to incorrect diagnoses and patient management.

Purpose of the Study:

  • To raise awareness among electroencephalographers about a new digital-specific artifact.
  • To describe an artifact that can be mistaken for epileptiform activity.
  • To prevent misdiagnosis caused by digital EEG errors.

Main Methods:

  • Identified and collected examples of the digital artifact from clinical EEG recordings.
  • Utilized custom software to visualize and highlight the artifact.
  • Analyzed raw digital data with hexadecimal editing software to confirm binary duplication errors.

Main Results:

  • The artifact presents as repetitive 50-millisecond signal intervals.
  • This repetition can resemble polyspikes, particularly on channels with sharp signal excursions.
  • A misinterpretation of this artifact once led to a patient being unnecessarily held for further evaluation.

Conclusions:

  • Digital artifacts pose a significant risk for erroneous neurological diagnoses.
  • This study details a novel digital artifact and its potential hardware origin.
  • Recommendations are provided for artifact identification and prevention by vendors.