A patient undergoing invasive EEG monitoring with stereotactic depth electrodes had a high-resolution spiral CT image acquired following electrode placement for verification and to rule out hemorrhage. The CT images were co-registered to the patient’s pre-operative 7-Tesla T1 weighted MRI using MIM version 6.8.3 (Mim Software Inc.), with pixel intensities averaged to optimize concurrent visibility of CT electrodes and MRI tissue contrast.