Figure 3.

Interictal band power abnormality as a marker of epileptogenic tissue in two example individual patients. [A(i) and B(i)] Postoperative T₁-weighted MRI scans showing the location of the resection as indicated by the green arrow. [A(ii)] Replication of the patient in Fig. 2 with the regions that were later surgically resected circled in black. Non-resected regions are circled in white. A direct comparison and quantification in the lower panel shows resected regions to be more abnormal than spared. Each data-point is a separate region. This patient was seizure free after surgery (ILAE1). [B(ii)] Visualization of data from a second patient with a frontal lobe implantation. Multiple abnormal regions were present outside the resection and spared by surgery. This patient had had continued postoperative seizures (ILAE4). In both patients, the $D_{RS}$ metric quantified the difference between resected and spared regions in terms of their abnormality.