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-2 | Engels |
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Pagina's (van-tot) | 153-9 |
Aantal pagina's | 7 |
Tijdschrift | Documenta ophthalmologica. Advances in ophthalmology |
Volume | 69 |
Nummer van het tijdschrift | 2 |
DOI's | |
Status | Gepubliceerd - jun. 1988 |