Resting-state functional MRI (r-fMRI) has emerged in recent years to analyze resting networks. It allows, without active participation of the patients, to identify and analyze the different functional brain networks. The analysis of r-fMRI can be done thanks to the graph theory, which is based on the based on the calculation of quantifiable parameters applied to the functional network studied, making it possible to assess its effectiveness.

To the knowledge of the investigators, no study has used graph theory applied to r-fMRI data in order to obtain parameters useful for the useful parameters for the individual prognosis of children who have to be operation for drug-resistant lesional epilepsy.

Inclusion Criteria:

• Patient aged between 6 and 18 years
• Receiving an MRI for lesional drug-resistant epilepsy
• Affiliated or beneficiary of a social security plan
• Whose parents or guardians have received information about the study and have given their express consent to participate in the study

Exclusion Criteria:

• Contraindication to absolute or relative MRI (in particular, pregnant or breastfeeding women)
• History of intracranial surgery
• MRI performed under general anesthesia

Patients from 6 to 18 years old receiving an MRI as part of a preoperative assessment of lesion epilepsy