Abstract
Recent studies with robot-guided stereotaxy use computed tomography (CT) scans for referencing. We will provide evidence that using preoperative MRI datasets referenced with a laser scan of the patient's face is sufficient for sEEG implantation. In total, 40 sEEG electrodes were implanted in five patients by the robotic surgical assistant (ROSA). The postoperative CT scan for identifying electrode positions was fused with the preoperative MRI-based planning data. The accuracy was determined by the target point error (TPE) and the entry point error (EPE), applying the Euclidean distance. The mean TPE amounted to 2.96mm, the mean EPE to 2.53mm. The accuracy was improved in 1.5T MRI: the mean TPE amounted to 1.72mm, the EPE to 0.97mm. No complications, haemorrhages, infections, etc., were observed. Robot-guided sEEG based on 3T MRI reduces radiation exposure for the patient and can still be performed safely.
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