[Freesurfer] Head Points data files

Hi,

What are the file format requirements for the 2 files called to load head points - *.hpts and *.trans into tkmedit or tksurfer?

We have a whole-head neuromagnetometer (4-D Neuroimaging 3600 Magnes MEG system) with 248 sensor channels.

I'd like to co-register my dipole locations with FreeSurfer's aseg+aparc.mgz to efficiently localize dipoles x ROIs. I have already co-registered index points and headshape files to each subject's aMRI within 4D's software.

Any advice is greatly appreciated!

Jenifer

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Jenifer Juranek, PhD

Assistant Professor

University of Texas MEG Lab

1333 Moursund St, Ste H114

Houston, TX 77030

Phone: 713.797.7574

Fax: 713.797.7590