Search found 10 matches

by m.roth
Mon Jun 29, 2009 4:21 pm
Forum: BrainVISA
Topic: DTI echo-planar distortion correction
Replies: 3
Views: 1819

Re: DTI echo-planar distortion correction

Hello Yann,

Thank you for this rapid answer. I sent you my data.

Sincerely yours,

Muriel ROTH
by m.roth
Mon Jun 29, 2009 12:27 pm
Forum: BrainVISA
Topic: DTI echo-planar distortion correction
Replies: 3
Views: 1819

DTI echo-planar distortion correction

Hi everybody, I work in Marseille on a Bruker 3T MRI system. I acquired DTI images with 16 T2 images and 48 b1000 directions. I import these data in my BrainVISA database. Then I try to run DTI echo-planar distortion correction. After few seconds, a pop up window show a memory problem and the follow...
by m.roth
Tue Dec 18, 2007 4:08 pm
Forum: BrainVISA
Topic: Echoplanar distortion correction on dti images
Replies: 2
Views: 1340

Re : Echoplanar distortion correction on dti images

Hi Yann, Thank you very much for your answer. First, a remark : -even if the SNR is low, we don't understand why the FOV is changed by the algorithm. Indeed, the FOV is stretched in the antero-posterior direction: the most anterior and posterior parts of the images are filled with zeros. If you like...
by m.roth
Tue Dec 11, 2007 12:21 pm
Forum: BrainVISA
Topic: Echoplanar distortion correction on dti images
Replies: 2
Views: 1340

Echoplanar distortion correction on dti images

Hi everybody, I applied echoplanar distortion correction on my bruker dti images acquired with b values of 400 and 1500 s/mm2. I observed a problem of FOV on some corrected images. In fact, this problem appears on the volumes with the smaller SNR (for b=1500 s/mm2). On a corrected volume, some slice...
by m.roth
Mon Dec 03, 2007 2:17 pm
Forum: BrainVISA
Topic: Apply a transformation to a 4D volume
Replies: 2
Views: 1392

4D volume transformation

Hi Yann,

Thank you for your help. I test it today and it works well.

Best regards,

Muriel
by m.roth
Tue Nov 27, 2007 5:17 pm
Forum: BrainVISA
Topic: Apply a transformation to a 4D volume
Replies: 2
Views: 1392

Apply a transformation to a 4D volume

Hello, I would like to apply a transformation to diffusion images (4D volume). Then I use Apply a transformation, but it add all the volumes (different directions for diffusion volumes) and it apply the transformation to the residual sum (the result is a 3D volume). Is it possible to apply a transfo...
by m.roth
Tue Nov 27, 2007 5:11 pm
Forum: BrainVISA
Topic: analyze to gis conversion and matfile
Replies: 4
Views: 2069

analyze to gis convertor

Thanks Isa for your help. I found my mistake (I have to change the template image when I apply the transformation).

Best regards,

Muriel
by m.roth
Thu Sep 06, 2007 4:07 pm
Forum: BrainVISA
Topic: analyze to gis conversion and matfile
Replies: 4
Views: 2069

analyze to gis conversion and matfile

Hello, Thank you for your answer. I have already read http://brainvisa.info/doc/aimsdata-3.0/html/en/referentials.html. It was useful to understand the difference between the SPM and the aims referentials. In fact, I just want to take into account the .mat files with the same name as the images. The...
by m.roth
Tue Aug 14, 2007 4:40 pm
Forum: AIMS
Topic: SPM2Defaults xml file
Replies: 1
Views: 4191

SPM2Defaults xml file

Hello, I would like to use spm realign process in brainvisa. I need then to have an xml file for the SPM default. I try to use in functional -> spm the aims program SPM2Defaults but I have the following error message : Undefined command/function 'xdefaults' DefaltsMisc.py(216) How can I resolve this...
by m.roth
Tue Aug 14, 2007 9:36 am
Forum: BrainVISA
Topic: analyze to gis conversion and matfile
Replies: 4
Views: 2069

analyze to gis conversion and matfile

Hello everybody, I want to superpose diffusion images to anatomical image on BrainVISA. I work on analyze images with a matfile. I try the spm to aims converter and then apply a transformation on anatomical image but I obtain as result an image centered on the left corner. Should I have an help on h...

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