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- Title
Improving the quality of multifocal visual evoked potential results by calculating multiple virtual channels.
- Authors
Mazinani, Babac; Waberski, Till; Weinberger, Andreas; Walter, Peter; Roessler, Gernot
- Abstract
Purpose: To introduce a method for improvement of multifocal VEP (mfVEP) recordings by prediction of waveforms at multiple positions on the surface of the skull. Methods: Fifteen healthy participants (mean age 24 ± 3.8 years) underwent mfVEP recordings from 3 surface positions. Two methods of a best- of- mfVEP approach were used and compared. In the first, a standard procedure, further data from 3 calculated channels were used. In the second approach, mfVEPs were obtained by using data derived from 40 virtual electrode positions on the basis of predictions from dipole source calculations. Results: The mean signal-to-noise ratios (SNRs) of the best-of-mfVEPs of both methods were compared. The SNR was significantly higher for mfVEP data using additional virtual recordings revealed by dipole source determination (2.87 vs. 3.36; P < 0.035). Conclusion: We conclude that multichannel prediction of mfVEP responses based on dipole source calculation significantly improves the quality of the examination results compared with the currently prevalent standard method.
- Subjects
SKULL; ELECTRODES; SIGNAL-to-noise ratio; VISUAL fields; BANDPASS filters
- Publication
Japanese Journal of Ophthalmology, 2011, Vol 55, Issue 4, p396
- ISSN
0021-5155
- Publication type
Article
- DOI
10.1007/s10384-011-0040-4