Reply-To: | | [log in to unmask][log in to unmask]> wrote: > Dear Tanja, > I suppose that the template in the attached image is your DARTEL-Template6. > This would explain the mismatch of the overlayed results, which are in MNI > space (The MNI template brain is a bit bigger than average anatomy). Try > projecting them on a standard MNI-template or create your > 'group-specific'-MNI-template by warping and averaging the structurals using > 'Normalize to MNI space' (input: u_rc1*, T1-structurals, Template6; no > modulation, no or only small smoothing). > > Hope this helps, > Michel > >> Date: Wed, 1 Dec 2010 20:38:58 +0100 >> From: [log in to unmask] >> Subject: [SPM] Fwd: [SPM] VBM8 quesiont >> To: [log in to unmask] >> >> Dear Michel, >> >> thank you for your answer. I tried to do just 3 steps, according to >> your mail. It looks a little better, but still something is wrong with >> template. >> >> In the attachment you can see the statistics overlaid on the >> Template6.nii. >> >> Do you have any idea what can be the problem, at which step can I make >> a mistake? >> >> The steps: >> 0. Reorient all the images to AC-PC line (most of images are .nii, but >> some are .img/.hdr) >> 1. Segmentation: Tools -> New Segment >> 2. DARTEL Tools -> Run DARTEL (Create Template) (input: rc1*.nii, >> rc2*.nii, rc3*.nii) >> 3. DARTEL Tools -> Normalize to MNI space (input: u_rc1*.nii, >> Template6.nii) >> 4. Factorial design specification (2 sample t-test, covariates: age, >> tissue volume) >> >> Thank you, >> Tanja. >> >> >> On Fri, Nov 26, 2010 at 9:26 PM, michel grothe <[log in to unmask]> >> wrote: >> > Dear Tanja, >> > there is a problem wit your processing steps. You´d normally directly >> > warp >> > the images to MNI space, i.e. omit steps 3 and 4. The "Normalize to MNI >> > space" option in SPM8 estimates an affine transform from the DARTEL >> > template >> > (specify your DARTEL-template_6 here) to the MNI-template and combines >> > it >> > with the individual DARTEL flow-fields to warp each subject directly >> > from >> > native space to MNI-space (better "average anatomy of your sample in MNI >> > space"). Step 3 and 4 had to be used in SPM5 but are not necessary >> > anymore >> > in SPM8. The "create warped"-option is only for the case you don´t want >> > to >> > normalise to MNI space (but to the pure average anatomy of your sample). >> > >> > Best, >> > Michel >> > >> >> Date: Fri, 26 Nov 2010 16:33:18 +0100 >> >> From: [log in to unmask] >> >> Subject: [SPM] VBM8 quesiont >> >> To: [log in to unmask]çRÖ< |