Hi FSLers,
I have some questions about FDT toolbox of FSL.
1) After completing BEDPOSTX, there are only 50 samples at each voxel. I
don't know which parameters are set to generate the number of samples. In
GUI display, I cannot find the configuration. I want to extend the number to
using them well.
2) During BEDPOSTX, which sampling technique is employed, still Markov Chain
MonteCarlo as PROBTRACKX? which model, diffusion tensor model or partial
volume model?
3) In the paper "Characterization and Propagation of Uncertainty in
Diffusion-Weighted MR Imaging" written by T.E.J Behrens and published on the
journal MRM, does local parameter estimation denote BEDPOSTX process, and
global connectivity estimation corresponds PROBTRACKX process? if so, the
former is 1000 samples and the latter is only 50 samlples in the paper.
Quite the contrary to the description above.
I am appreciated for any suggestions.
Liang Wang
|