BrainVISA

Hi everybody, I converted a grey/white surface from BV with the process of Olivier and loaded it in matlab with the gifti class of SPM8b. Everything worked well, thanks! It doesnt work with multiple mesh (like in a graph), but it is possible to convert a multiple mesh file to multiple files with Aim...

I've processed your data under BV versions 3.0.1, 3.1, and 3.1.3. on my 64 bit Fedora core 8 and everything was fine.

I've checked every resulting *.dim and they were all identical to the initial.
No bug on my side...

Hi Jeff,
The thresholding solves this issue, but it is strange to obtain negative values by smoothing a non negative mask...
Matthieu said to me that it comes from numerical approximations, as you confirm.

Thank you!

Hello everybody, when i apply a gaussian smoothing to a volume, the resulting image shows multiple voxels at around +or- 10^ -40. ( comand : ~/SHFJ_pack-stable-linux-3.0.2/bin/AimsImageSmoothing -i myVol.ima -o myVolSmooth.ima -t 2 -s 0) I tried to convert my volume from FLOAT to DOUBLE (this looks ...

Hi, sorry for this perhaps "for dummy's" topic, I don't understand the use of the 'good_regonition_percentage' process. The imput is a directory, but which? I tried one subject directory or a group of subjects, or a graphe directory, and i already had the error : IOError: [Errno 21] Is a d...

Hi, after a quite long search on the forum, i have no answer to the following question: is it possible to compute the complete Talairach normalisation (not only CA-CP alignment) of a full volume? I mean not only a referential change on the fly at load time but the computation af new coordonnates of ...

it seems that when i run "create sulcus labels volume" on my first subject, specifying an output int/labels translation file, this one contain a translation file with labels proper to that subject. Then i use this file as input for an other subject, saving it at the same place, but the int...

Hi, i played with thoses translations for a while and i have some infos about it: for use the old .def format, renaming it in .trl is enougth. I can't find "sulci_model_noroors.trl" in my BV release (3.0.2), and used "sillons_model_ventric.def" (which is linked by sillons_model.d...

Hi,
I had the same problem, and tried the Denis' solution but Brainvisa needed not a .def but a .trl for translation file.
I so found one in <SHFJ_pack>/share/shfj/nomenclature/translation/translation_epidaure.trl
and the "intensity" numbers in volumes are now consistent.

Guillaume

hi!! I think there is a mistake in the example of .mesh given in the help 'pdf' i found on http://brainvisa.info I think the normals associated with a mesh which polygone Dimension is 2 must be a vector which size must be 3 * number of vertices and not just one 0 like in the example. I tryed with 3 ...

Hi Arnaud, thanks for your help,
I have read your conversation about the .tex, and i have no any .txt in my graphe directory, even i made the automatic silcus recognition...

Yes! those are your data!
i did not undersrtand it was you who gave this to Sylvain...
so can you explain to me how do you obtain this? (is this the sulci projection?)
It seems to me that the people from Marseillle has not the same problem, but i will search again.
thanks.

sorry for this not explicit problem... i try to do a better one: My final goal is to match two brain mesh from two different patient (recalage inter-individuel monomodal) and i fisrt would try to match only the ""fond de sillons"" of the bigger sulcus. I have a 'subject_Lwhite_su...

Hi brain master, I need to extract the coordonnates of the bottom points of the sulci, I can obtain thoses from the .mesh and the white_sulci.tex, this give to me the coords with the int from the .tex but i dont know which of this int correspond to which sulcus... so the question is : how do corresp...