Measuring oscillatory potentials: Fourier analysis

K van der Torren, G Groeneweg, G van Lith

    Onderzoeksoutput: Bijdrage aan tijdschriftArtikelOnderzoekpeer review

    Samenvatting

    Studying the oscillatory potentials in diabetic retinopathy, the authors experienced several problems interpreting results of digital filtering. The main problem was the separation of the first potential from the a-wave, since their frequencies are within the same range. To improve the procedure of measuring implicit times and of calculating amplitudes, the filtering was started with a finite impulse response filter and followed by a fast Fourier transform. The power of the oscillatory potential was calculated by determining the dominant frequency in the Fourier transformed response and expressed in microwatts. A group of normal subjects was compared with a group of early diabetic retinopathy patients. It appears that even in pathological circumstances a quantitative expression of the oscillatory potential is possible.

    Originele taal-2Engels
    Pagina's (van-tot)153-9
    Aantal pagina's7
    TijdschriftDocumenta ophthalmologica. Advances in ophthalmology
    Volume69
    Nummer van het tijdschrift2
    DOI's
    StatusGepubliceerd - jun. 1988

    Vingerafdruk

    Duik in de onderzoeksthema's van 'Measuring oscillatory potentials: Fourier analysis'. Samen vormen ze een unieke vingerafdruk.

    Citeer dit