2007/8/6, Bruce Fischl < fischl@nmr.mgh.harvard.edu>:

they don't matter. For a real volume they would be the ras2vox transform
and the mr parameters. For your purposes they can be any 4x4 and you can
leave the mri_parms one out (it will detect and fill it in with zeros).

Send these to the list so other people can answer!

Bruce
On
Mon, 6 Aug 2007, Inês Souta wrote:

> Hi again,
>
> I still don't understand what all the input objects of save_mgh function
> stand for. 'vol' is the vector of thickness values, 'fname' is the name of
> the output .mgh file, and what about M and <mr_parms>? What do they stand
> for and how should I define them?
>
> Thanks again,
>
> Ines
>
> 2007/7/31, Bruce Fischl < fischl@nmr.mgh.harvard.edu>:
>>
>> Hi Ines,
>>
>> use the mgh route. The "vol" is actually the vector of thickness values,
>> with one entry per vertex on the surface.
>>
>> cheers,
>> Bruce
>> On Tue, 31 Jul 2007, Inês Souta
>> wrote:
>>
>>> Hello,
>>>
>>> I was trying to create a cortical thickness map with constant values in
>>> order to perform some tests. At first I tried using mris_convert. I
>>> converted my thickness file into ascii:
>>>
>>> mris_convert lh.thickness lh.thickess.asc
>>>
>>> then I used matlab to change all the values in the last column to 2,0. I
>>> tried to convert the ascii file back to surface file by doing
>>>
>>> mris_convert lh.thicness.asc lh.thickness
>>>
>>> but I got "Segmentation fault". How can I convert may ascii file into a
>>> surface one?
>>>
>>> After failling to acomplish this, I tried using the save_mgh and
>> load_mgh
>>> file, nevertheless I'm not quite sure which input values are needed.
>> Where
>>> can I put my fake values in the save_mgh file? And what is "vol"?
>>>
>>> Thanks,
>>>
>>> Ines
>>>
>