The tool allows removing the face voxels from human anatomical MRI and CT images. The images need to be provided in HFS orientation. It is assumed no motion is observed in case of dynamic studies.
Enable the Define head location within image bounding box relative to image top in milimetres or slices in the From, to section. Select the appropriate Template for the normalization procedure in the Mask (Normalize MR/CT to Template) panel. Initially try with the default sampling distance of 8 mm. This value can be manually edited if needed.
The procedure is based on the Brain Template Normalization implemented in the fusion tool. Start the defacing procedure activating the OK button. Initially the normalization between the input image and the selected MNI template is calculated. The inverse of the direct transformation is calculated and applied to transform the predefined faced mask in MNI space to the image space.