A multimodal imaging approach to the evaluation of post-traumatic epilepsy

作者：Storti Silvia F^*; Formaggio Emanuela; Franchini Enrica; Bongiovanni Luigi G; Cerini Roberto; Fiaschi Antonio; Michel Christoph M; Manganotti Paolo

来源：Magnetic Resonance Materials in Physics Biology and Medicine, 2012, 25(5): 345-360.

DOI：10.1007/s10334-012-0316-9

• Post-traumatic epilepsy
• EEG-fMRI
• Source localization

Electroencephalography-functional magnetic resonance imaging (EEG-fMRI) coregistration and high-density EEG (hdEEG) can be combined to map noninvasively abnormal brain activation elicited by epileptic processes. By combining noninvasive imaging techniques in a multimodal approach, we sought to investigate pathophysiological mechanisms underlying epileptic activity in seven patients with severe traumatic brain injury. %26lt;br%26gt;Standard EEG and fMRI data were acquired during a single scanning session. The EEG-fMRI data were analyzed using the general linear model and independent component analysis. Source localization of interictal epileptiform discharges (IEDs) was performed using 256-channel hdEEG. Blood oxygenation level dependent (BOLD) localizations were then compared to EEG source reconstruction. %26lt;br%26gt;On hdEEG, focal source localization was detected in all seven patients; in six out of seven it was concordant with the expected epileptic activity as defined by EEG data and clinical evaluation; and in four out of seven in whom IEDs were recorded, BOLD signal changes were observed. These activities were partially concordant with the source localization. %26lt;br%26gt;Multimodal integration of EEG-fMRI and hdEEG combining two different methods to localize the same epileptic foci appears to be a promising tool to noninvasively map abnormal brain activation in patients with post-traumatic brain injury.

• 出版日期2012-10