http://www.nitrc.org/forum/forum.php?forum_id=6408 <table border="0" width="100%"><tr><td align="left"/></tr></table> <p><b>Marker-based ballistocardiographic artifact correction improves spike identification in EEG-fMRI of focal epilepsy patients.</b></p> <p>Clin Neurophysiol. 2016 Jun 8;127(8):2802-2811</p> <p>Authors: Körbl K, Jacobs J, Herbst M, Zaitsev M, Schulze-Bonhage A, Hennig J, LeVan P</p> <p>Abstract<br/> OBJECTIVES: Ballistocardiographic (BCG) artifacts resemble interictal epileptic discharges (IEDs) and can lead to incorrect IED identification in EEG-fMRI. This study investigates IEDs marked in EEGs corrected using information from a moiré phase tracking (MPT) marker.<br/> METHODS: EEG-fMRI from 18 patients was processed with conventional methods for BCG removal, while 9 patients used a MPT marker. IEDs were marked first without ECG information. In a second review, suspicious IEDs synchronous with the BCG were discarded. After each review, an event-related fMRI analysis was performed on the marked IEDs.<br/> RESULTS: No difference was found in the proportion of suspicious IEDs in the 2 patient groups. However, the distribution of IED timings was significantly related to the cardiac cycle in 11 of 18 patients recorded without MPT marker, but only 2 of 9 patients with marker. In patients recorded without marker, failing to discard suspicious IEDs led to more inaccurate fMRI maps and more distant activations.<br/> CONCLUSIONS: BCG artifact correction based on MPT recordings allowed a more straightforward identification of IEDs that did not require ECG information in the large majority of patients.<br/> SIGNIFICANCE: Marker-based ballistocardiographic artifact correction greatly facilitates the study of the generators of interictal discharges with EEG-fMRI.<br/> </p><p>PMID: 27417056 [PubMed - as supplied by publisher]</p> en-us Copyright 2000-2026 NITRC OSI Tue, 05 May 2026 6:32:44 GMT http://blogs.law.harvard.edu/tech/rss NITRC RSS generator