Hi Matt - Thanks for your kind words!
The merged_*.mgz file is just a 4D mgz file where each frame corresponds to one of the 18 tracts. The only special thing about this mgz file is that it has some special fields in its header that tell freeview how to display each tract (color, name, and threshold). I haven't tried this, but I would guess that if you performed any operation on that mgz file, those header fields would be preserved. And if they're not they should be, so we should know about it.
You can try to map each mgz file from individual DWI space to a common space with mri_vol2vol and then average them with mri_concat. Let us know if this ends up working or if you have any questions about these steps.
Thanks! a.y On Thu, 6 Jun 2013, Hoptman, Matthew wrote:
Hi all, Thanks for tracula , which I think is a terrific tool. Is there any way to average tracts across subjects for viewing purposes? I have in mind somehting along the line of a group average merged_avg33_mni_bbi.mgz. Thanks, Matt Matthew J. Hoptman, PhD Research Scientist V Nathan S. Kline Institute for Psychiatric Research Research Associate Professor in Psychiatry NYU School of Medicine IMPORTANT NOTICE: This e-mail is meant only for the use of the intended recipient. It may contain confidential information which is legally privileged or otherwise protected by law. If you received this e-mail in error or from someone who was not authorized to send it to you, you are strictly prohibited from reviewing, using, disseminating, distributing or copying the e-mail. PLEASE NOTIFY US IMMEDIATELY OF THE ERROR BY RETURN E-MAIL AND DELETE THIS MESSAGE FROM YOUR SYSTEM. Thank you for your cooperation. ____________________________________________________________________________ Conserve Resources. Print only when necessary. IMPORTANT NOTICE: This e-mail is meant only for the use of the intended recipient. It may contain confidential information which is legally privilegedor otherwise protected by law. If you received this e-mail in error or from someone who is not authorized to send it to you, you are strictly prohibited from reviewing, using, disseminating, distributing or copying the e-mail. PLEASE NOTIFY US IMMEDIATELY OF THE ERROR BY RETURN E-MAIL AND DELETE THIS MESSAGE FROM YOUR SYSTEM. Thank you for your cooperation. IMPORTANT NOTICE: This e-mail is meant only for the use of the intended recipient. It may contain confidential information which is legally privileged or otherwise protected by law. If you received this e-mail in error or from someone who is not authorized to send it to you, you are strictly prohibited from reviewing, using, disseminating, distributing or copying the e-mail. PLEASE NOTIFY US IMMEDIATELY OF THE ERROR BY RETURN E-MAIL AND DELETE THIS MESSAGE FROM YOUR SYSTEM. Thank you for your cooperation.
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