you need to run the inter-subject registration (spherical mapping, and
spherical morph). Aren't you using recon-all? Maybe we should take this
discussion to the FreeSurfer list....
Bruce
On Thu, 21 Sep 2006, Joongnam Yang wrote:
> Thanks, Bruce.
>
> I ran make_average_subject, which gave me the following two-line error
> message.
>
> Reading /usr/local/freesurfer/subjects/DPJ/ANA/surf/rh.sphere.reg
> MRISread(/usr/local/freesurfer/subjects/DPJ/ANA/surf/rh.sphere.reg): could
> not open file
>
> I looked at all of my sujbects' data which have been processed by Freesurfer
> up to flattening.
> I couldn't find *.sphere.* file in any of any 'surface' directory.
>
> Would you please let me know what I am missing here?
>
> Nam.
>
>>>> [log in to unmask] 09/19/06 4:34 PM >>>
> Hi Joe and Nam,
>
> you can display the results on the fsaverage subject, or we provide tools
> for creating your own average (make_average_subject).
>
> cheers,
> Bruce
>
> On Tue, 19 Sep 2006,
> Joseph Devlin wrote:
>
>> Dear Nam,
>>
>> Actually, it's a good question and the answer depends on what you're
> trying
>> to do. I would suggest that group results should only be displayed on a
>> group averaged brain, either from your own subject group or some sort of
>> population average (e.g. the MNI152). Showing the results on any
>> individual's anatomy, such as can be done on inflated brains in
> freesurfer,
>> is misleading because it implies an anatomical precision which is not
>> correct. Since the functional data do not come from a single brain, they
>> shouldn't be shown on a single brain. It may be possible to show the
> results
>> on a group average in freesurfer -- I've never tried that but it should be
>
>> possible in spherical space. That would then accurately reflect the
>> macroanatomic variability of the sample from which the functional data
> were
>> derived.
>>
>> BTW, the problem is not specific to freesurfer surfaces but applies to any
>
>> rendering of group functional data.
>>
>> Good luck.
>>
>> - Joe
>>
>> -------------
>> Joseph T. Devlin, Ph. D.
>> FMRIB Centre, Dept. of Clinical Neurology
>> University of Oxford
>> Headley Way
>> Oxford OX9 3DU
>> Phone: +44-(0)1865-222-494
>> Email: [log in to unmask]
>>
>>
>>
>
>
>
|