• DocumentCode
    979558
  • Title

    The Influence of CSF on EEG Sensitivity Distributions of Multilayered Head Models

  • Author

    Wendel, K. ; Narra, N.G. ; Hannula, M. ; Kauppinen, P. ; Malmivuo, J.

  • Author_Institution
    Tampere Univ. of Technol., Tampere
  • Volume
    55
  • Issue
    4
  • fYear
    2008
  • fDate
    4/1/2008 12:00:00 AM
  • Firstpage
    1454
  • Lastpage
    1456
  • Abstract
    We examined how the cerebrospinal fluid (CSF) affects the distribution of electroencephalogram (EEG) measurement sensitivity. We used concentric spheres and realistic head models to investigate the difference between computed-tomography (CT) and magnetic resonance image (MRI) models that exclude the CSF layer. The cortical EEG sensitivity distributions support these phenomena and show that the CSF layer significantly influences them, thus identifying the importance of including the CSF layer inside the head volume conductor models. The results show that the highly conductive CSF channels the current, thus decreasing the maximum cortical current density relative to models that do not include the CSF. We found that the MRI and CT models yielded HSV results 20% and 45%, respectively, too small when compared with CSF-inclusive models.
  • Keywords
    bioelectric phenomena; biomedical MRI; biomedical measurement; computerised tomography; current density; diagnostic radiography; electroencephalography; neurophysiology; physiological models; EEG measurement sensitivity distribution; computed-tomography models; concentric spherical head model; conductive CSF channels; cortical current density; electroencephalogram; magnetic resonance image models; multilayered head volume conductor models; realistic head models; Brain modeling; Computed tomography; Conductors; Current density; Electroencephalography; Image segmentation; Magnetic heads; Magnetic resonance; Magnetic resonance imaging; Scalp; Skull; CSF; Conductivity; EEG; Sensitivity distribution; cerebrospinal fluid (CSF); conductivity; electroencephalogram (EEG); lead field current density; sensitivity distribution; volume conductor; Artifacts; Brain; Brain Mapping; Cerebrospinal Fluid; Computer Simulation; Diagnosis, Computer-Assisted; Electroencephalography; Head; Humans; Models, Biological; Reproducibility of Results; Sensitivity and Specificity;
  • fLanguage
    English
  • Journal_Title
    Biomedical Engineering, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9294
  • Type

    jour

  • DOI
    10.1109/TBME.2007.912427
  • Filename
    4384304