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Measuring oscillatory potentials: Fourier analysis

✍ Scribed by K. Torren; G. Groeneweg; G. Lith

Book ID
104645354
Publisher
Springer-Verlag
Year
1988
Tongue
English
Weight
300 KB
Volume
69
Category
Article
ISSN
0012-4486

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✦ Synopsis

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.

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✍ K. Torren; G. Groeneweg; G. Lith πŸ“‚ Article πŸ“… 1988 πŸ› Springer-Verlag 🌐 English βš– 191 KB

Recently we developed a quantitative method of measuring the Oscillatory Potentials (OP's) for a clinical study in diabetic patients. Several problems were experienced in interpreting the results obtained with digital filtering. The main dilemma was the separation of the first OP from the a-wave, si