• Moneer K Faraj, Safa L Kailan, and Auns Q H Al-Neami.
• Department of Surgery, Consultant Neurosurgeon, College of Medicine, University of Baghdad, Baghdad, Iraq. Electronic address: drmkfaraj@uob.edu.iq.
• World Neurosurg. 2022 Aug 1; 164: 143-147.

BackgroundNavigation technique facilitates reaching deeply seated masses more precisely with the least sacrifice of normal tissues. There are 2 primary navigation systems: electromagnetic and infrared (optical). The technique is based on recording the head position intraoperatively and merging this image with preoperative magnetic resonance imaging.MethodsWe tried to replace these conventional navigating systems with a simple technique using free software (3-dimensional slicer) and a computer air mouse. The study was designed into 3 stages. In stage 1, we used this method on 3-dimensional printed models of patients' magnetic resonance images with deeply seated brain tumors. In stage 2, we performed the surgeries on patients. In the last stage, we used both the conventional navigation system with our method simultaneously on the same patients and compared the accuracy of both methods.ResultsThis new system was as accurate as conventional navigating systems, ranging from ±2 mm.ConclusionsThis new technique, if done properly, can replace conventional methods with less time of preparation, and its cost is almost free.Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.

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