Digital conversion of paper electroencephalograms using a hand scanner.
We report a method of quantifying the analog signal of paper-recorded EEGs that involves readily available technology, including a standard personal computer and a compatible hand scanner. Simulations assessed the effects of erroneously scanning the paper at a slight angle and estimating pen arc distortion; these effects were demonstrated to be insignificant. The method allows application of several quantitative techniques, including power spectral analysis and determination of the squared coherence between homologous regions. In a companion study, we applied this technique to compare the coherence in patients with alpha pattern coma to coherence in normal subjects.
McKeown
M J
MJ
Department of Clinical Neurological Sciences, University of Western Ontario, London, Canada.
Young
G B
GB
D000703:Analog-Digital Conversion; D016287:Computer Peripherals; D003198:Computer Simulation; D004569:Electroencephalography / Q000295:instrumentation / Q000379:methods*; D001330:Electronic Data Processing / Q000295:instrumentation / Q000379:methods*; D005069:Evaluation Studies as Topic; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*