Diffusion tensor estimation and brain extraction

Questions about BrainVisa usage and installation

Moderators: denghien, riviere

Post Reply
olivierh
Posts: 1
Joined: Tue Apr 24, 2012 8:33 am

Diffusion tensor estimation and brain extraction

Post by olivierh »

Hi,

I'm interesting in variability of FA values due to acquisition or post-processing.
So, I have some question about FA computing

There are various methods to

- perform eddy current correction
- brain extraction
- estimate the diffusion tensor (linear least squares, non linear least squares...)

How Brain visa computes that ?
I didn't find any information about that.

Thank you in advance,

Olivier
User avatar
Yann Cointepas
Posts: 316
Joined: Tue Jan 20, 2004 2:56 pm
Location: Neurospin, Saint Aubin, France
Contact:

Re: Diffusion tensor estimation and brain extraction

Post by Yann Cointepas »

For eddy current correction and diffusion tensor estimation I think BrainVISA still rely on methods described in the following paper.

ftp://static.lnao.fr/lnao/static/papers ... -MIA01.pdf

The brain extraction from T2 images (i.e. not the brain extraction from T1 done in Morphologist toolbox) is done by a simple chaining of thresholding, erosion, selection of biggest connected component and dilation.
Post Reply