Thank you for sharing this very impressive toolbox! I also appreciate the clarity of the design and how simple it is to use. While I understand why the normalization to MNI space is crucial (so we can use the template), I wonder if there is a way to make it work in subject space. For example, we acquire many preop scans (high resolution) that enable us to do manual segmentation of the the STN, SN, RN, GPi, GPe, Thalamus… quite robustly. We coregister these scan to a common scan (say the T1) so we can visualize everything using subject-defined segmentation. Via the toolbox we can easily register the postop data to the T1 and we can also probably extract the electrodes from the postop CT. However, the visualization is currently not possible. Would it be possible to add an option for which we could import a nifti file containing our manual segmentation that can then be visualized with the toolbox?