On Mon, Oct 12, 2009 at 12:17 PM, Matt Glasser <[log in to unmask]> wrote:

FDT will do a better job overall than the deterministic tensor based tractography method in that paper.  Whether or not you would find a connection between those two regions would depend on the quality of your data (more directions and a higher b value allow you to better model regions of crossing fibers), and if a connection actually exists.

 

Peace,

 

Matt.

 

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From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Laurence O'Dwyer
Sent: Monday, October 12, 2009 12:04 PM
To: [log in to unmask]
Subject: Re: [FSL] bedpostX and the angular gyrus

 

Hi,
     The reference is Greicius et al., 2009; Cereb Cortex, 19(1): 72-78. (It is not a NeuroImage paper as I stated earlier, apologies for this).
      Best,
              Lar

On Mon, Oct 12, 2009 at 4:28 PM, Markus Gschwind <[log in to unmask]> wrote:

Hi!

 

A recent study Greicius et al., 2009, in NeuroImage

 

I am highly interested in this reference. Could you please precise it, I cannot find it.

Thank you very much,
Markus

2009/10/12 Laurence O'Dwyer <[log in to unmask]>

 

Hi,
   I have a query about the ability of probtractx to assess tracts that run
laterally to and from the angular gyrus. A recent study Greicius et al.,
2009, in NeuroImage, noted the difficulty of assessing whether or not there
are direct connections between the angular gyrus and the posterior cingulate
cortex. It was assumed in this study that these laterally running fibers
would be impossible to trace through the larger anterior-to-posterior
oriented tracts of the superior longitudinal fasiculus and the
superior-to-inferior tracts of the corona radiata.
       I would be interested to know if anyone knows how bedpostx and probtrackx
are likely to fair in delineating tracts in this region and whether or not
it would be able to cope with the complexity of crossing fibres here.
       With thanks,
                       Lar

--
Dr. med. Markus Gschwind, M.D.
Laboratory for Neurology and Imaging of Cognition
Dept of Neurosciences
University Medical Center (CMU)
1 Michel-Servet - 1211 GENEVA - CH

Tel 0041 (0) 22 379 5324
Fax 0041 (0) 22 379 5402
email: [log in to unmask]
http://labnic.unige.ch


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