Special designed RF-antenna with integrated non-invasive carbon electrodes for simultaneous magnetic resonance imaging and electroencephalography acquisition at 7T

Magn Reson Imaging. 2000 Sep;18(7):887-91. doi: 10.1016/s0730-725x(00)00172-7.

Abstract

The construction of a high quality MR RF-antenna with incorporated EEG electrodes for simultaneous MRI and EEG acquisition is presented. The antenna comprises an active decoupled surface coil for receiving the MR signal and a whole body coil for transmitting the excitation RF pulses. The surface coil offers a high signal-to-noise ratio required for fMRI application and the whole body coil has a good B(1) excitation profile, which enables the application of homogeneous RF pulses. Non-invasive carbon electrodes are used in order to minimise the magnetic susceptibility artefacts that occur upon application of conductive materials. This dedicated set-up is compared to a standard set-up being a linear birdcage coil and commercially available Ag/AgCl electrodes. As the acquired EEG signals are heavily disturbed by the gradient switching, intelligent filtering is applied to obtain a clean EEG signal.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Artifacts
  • Brain Mapping / instrumentation
  • Carbon*
  • Electrodes
  • Electroencephalography / instrumentation*
  • Electroencephalography / methods
  • Electromagnetic Fields
  • Equipment Design
  • Magnetic Resonance Imaging / instrumentation*
  • Magnetic Resonance Imaging / methods
  • Phantoms, Imaging
  • Radio Waves*
  • Rats
  • Rats, Wistar
  • Sensitivity and Specificity
  • Signal Processing, Computer-Assisted / instrumentation*

Substances

  • Carbon