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Electroencephalogram-triggered functional magnetic resonance imaging in focal epilepsy.

Abstract：

:The high spatial resolution and cost performance of functional magnetic resonance imaging (fMRI) is useful for estimating focus localization in epilepsy, but this is difficult in the case of ictal fMRI because this is susceptible to motion artifacts. Electroencephalogram (EEG)-triggered fMRI, which is interictal, can be performed without marked movement and is thought to be useful, but requires further investigation in order to establish a methodology. The authors studied EEG-triggered fMRI in partial epileptic patients. Six patients were examined using a Nihon Kohden digital EEG recorder and Signa Horizon High Speed LX 1.5 T MRI scanner. Six electrodes were attached in the vicinity of the focus detected by scalp EEG. The fMRI scans were recorded after the discharges (activation) and scans without spikes (baseline). Equal numbers of activation and baseline scans were collected and analyzed using SPM99. In three of the six patients, an activated area was observed near the focus, but no activated areas were found in the other three subjects who tended to have a low number of spikes and low spike amplitude. Although various approaches focusing on improvement of the activation/non-activation ratio are required, EEG-triggered fMRI is a promising technique for detecting focal epileptic brain activity.

journal_name

Psychiatry Clin Neurosci

journal_title

Psychiatry and clinical neurosciences

authors

Kikuchi S,Kubota F,Nishijima K,Hirai N,Washiya S,Fukuda J,Takahashi A,Shibata N,Kato S

doi

10.1111/j.1440-1819.2004.01238.x

subject

Has Abstract

pub_date

2004-06-01 00:00:00

pages

319-23

issue

3

eissn

1323-1316

issn

1440-1819

pii

PCN1238

journal_volume

58

pub_type

杂志文章

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