Surface Module Features

Mesh Manipulation & Surface Reconstrcution

• Head reconstruction with deformable models (i.e. sphere)
• Automatic polygon mesh reconstruction of the segmented cortex along the white/grey matter boundary and the pial surface
• Automatic correction of topological errors in the cortical surface
• Creation and display of multiple surfaces (i.e. scenes composed of cortical hemisphere and transparently rendered head)
• Interactive translation, rotation, and zooming of meshes
• Colouring of convex/concave curvature, sulcal depth and statistical maps
• Triangle strip creation of polygon meshes for fast mesh manipulations
• Export as .DXF, .VMRL, or .STL polygon meshes (i.e. for prototyping, physical brain models)

Surface Slicing, Cortex Inflation & Unfolding

• Interactive real-time slicing through head and brain meshes
• Combined display of multiple cut planes
• Automatic inflation, cutting and flattening of reconstructed cortical hemispheres
• Specification of parameters for various deformation forces
• Reference between 3D coordinates of morphed mesh (e.g. flattened cortex) to original mesh (e.g. folded cortex)
• Display of statistical 3D maps on inflated or flattened surface
• Immediate access and display of time course data for any surface patch
• Surface-based inter-subject alignment

Display Utilities

• Simultanous colour-coded display of statistical surface maps or ICA component maps
• Meshes as point models, wire frames, shaded surfaces
• Transparent rendering of selected meshes
• Visualization of MEG/EEG multiple dipole models and waveforms
• Specification of mesh colours and multiple light sources
• Scene antialiasing; scene animation
• Saving and loading of scene viewing conditions
• Creation and display of fMRI and MEG activation movies on slices and meshes
• Export of current 2D or 3D view as 8-bit PNG/GIF/BMP or 24-bit BMP/JPEG file
• Export of dynamic processes as AVI/MNG movie files

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