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
Diffusion tensor estimation and brain extraction
- Yann Cointepas
- Posts: 316
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- Location: Neurospin, Saint Aubin, France
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Re: Diffusion tensor estimation and brain extraction
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.
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.
- Jean-Francois Mangin
- Posts: 337
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- Location: Neurospin, CEA, France
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