Visualization tools for magnetoencephalography

We describe the development of computer visualization tools that display topographic maps of neuromagnetic data on a realistic head shape. Two topographic display modes are implemented — a "raw" mode that shows the actual position and orientation of the detection coils with respect to the head shape, as well as the magnetic field sensed by each coil, and a "cooked" mode, where the magnetic data is interpolated onto the scalp. False coloration is used to represent magnetic field strength. The topographic displays are combined with waveform displays in order to integrate spatial and temporal visualization of the data. Dipole fitting routines have also been incorporated into the software.