+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Stroboscopic artifact in digital video-EEG

Journal of Clinical Neurophysiology 21(2): 96-98
Stroboscopic artifact in digital video-EEG
Combined digital video-EEG (DV-EEG) systems eliminate many familiar technical artifacts of older analog recorders; however, new and unanticipated technical issues are becoming evident. In this report, a case is described that identifies one of these technical limitations that could represent a pitfall to accurate data interpretation. An EEG was recorded on an 18-year-old man with history of photically sensitive generalized tonic-clonic seizures, revealing photoparoxysmal responses that appeared to outlast photic stimulation. However, in an attempted video-EEG correlation, the digital video recording showed variable appearance or absence of photic bursts that did not correlate with EEG photic tick marks, initially suggesting desynchronization between video and EEG signals. However, the absence of flashes seen on the video record resulted from stroboscopic artifact caused by mismatch between strobe frequency, video sampling rate, and video display characteristics. Stroboscopic aliasing is a DV-EEG specific artifact that can complicate accurate interpretation of photoparoxysmal responses.

(PDF same-day service: $19.90)

Accession: 050394417

PMID: 15284599

DOI: 10.1097/00004691-200403000-00003

Related references

The use of digital video recorders (DVRs) for capturing digital video files for use in both The Observer and Ethovision. Behavior Research Methods 38(3): 434-438, 2006

Video-stroboscopic advances. Smee, R, Bridger, G P International Congress Series; Laryngeal cancer 270-272, 1994

Selection of video cameras for stroboscopic videolaryngoscopy. Annals of Otology, Rhinology, and Laryngology 96(5): 578-585, 1987

Video-stroboscopic assessment of vocal fold tumor. Smee, R, Bridger, G P International Congress Series; Laryngeal cancer 273-275, 1994

Advantages of indirect video-stroboscopic surgery of the larynx. Folia Phoniatrica 42(2): 77-82, 1990

The accuracy of digital-video retinal imaging to screen for diabetic retinopathy: an analysis of two digital-video retinal imaging systems using standard stereoscopic seven-field photography and dilated clinical examination as reference standards. Transactions of the American Ophthalmological Society 102(): 321-340, 2005

Development of image processing system for fundus video-angiography with non-stroboscopic illumination. Nippon Ganka Gakkai Zasshi 95(9): 861-868, 1991

Three-dimensional vibrometry of the human eardrum with stroboscopic lensless digital holography. Journal of Biomedical Optics 20(5): 051028-051028, 2015

Imaging the cellular response to transient shear stress using stroboscopic digital holography. Journal of Biomedical Optics 16(12): 120508-120508, 2012

Converting laserdisc video to digital video: a demonstration project using brain animations. Journal of the American Medical Informatics Association 2(1): 1-3, 1995