---------- Forwarded message ---------- From: Bruce Fischl <[EMAIL PROTECTED]> Date: 06/08/2007 14:23 Subject: Re: [Freesurfer] Fake thickness map 2 To: Inês Souta <[EMAIL PROTECTED]>
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 <[EMAIL PROTECTED]>: >> >> 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 >>> >
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