Parametrization of sulci

[Betina Vase]

Hi

I'm interested in a parametrization of CS. The sulci have been extracted (nicely!) in Brain Visa and afterwards manually corrected. The current format is .ply. I have two questions:

1) In a post from Oct 2012 it says that the parametrization it is not fully implemented is that still true?
2) Is there some way I can transform my .ply into .arg?

Thanks
Betina

[Olivier Coulon]

Hello Betina,

to answer your two questions:
1 - the sulcal parameterization is fully implemented in BV 4.4. It is tuned for the Central Sulcus, mostly. And in any case it will not work for sulci with several connected components and/or branches. Have a look at the following page for more help: http://olivier.coulon.perso.esil.univme ... ation.html
2 - I don't understand why you have ply files. This is a mesh format. On the other hand the .arg format is a graph format, and it can cntain meshes for nodes (sulci) as .mesh objects. Can you explain a bit more how you got there ?

Thanks,

Olivier

[Betina Vase]

I do apologize for my missing answer!

I have converted all files to .ply (AimsmeshBrain), in order to make visual inspections and to correct them manually. The reason why I want my mesh to .arg format is in order to use your parametrization.

Is there any way your parameterization can be used based on a mesh (output by AimsmeshBrain)?

Betina

[Olivier Coulon]

The process uses .arg files, that contain all sulci, gets the sulcus of interest based on its name or label, and then generates the appropriate mesh.
So all you have to do is generate the .arg file containing all sulci (this is the las step of the morphologist pipeline), label the CS, and run the parametrization. I don't see why you need to convert to ply files.

Olivier