Epileptogenic Network Visualisation With Advanced MRI

Patient identified for SEEG will undergo, prior to the implantation procedure an MRI with the following sequences: * 3D T1 * rsfMRI * multishell diffusion The rsfMRI will be post-processed to delineate the epileptogenic networks based on an Independant Component Analysis (ICA) methods. Once the epileptogenic network(s) has/have been identified, connexion between the different regions will be identified through post-processing of the diffusion using a MSMT-CSD algorithm. Finally, the identified tract between the different region will be quantitatively analysed using different algorithms (NODDI, DIAMOND, MF) to better grasp there integrity. In a follow-up study, the patients that will later on benefit from a resection or disconnection (i.e. curative surgery) will also have an identical MRI 3 months after the said procedure to evaluate the evolution on the network(s) based on the same criteria.