[Mristudio-users] transverse diffusion parameters

[Prachi Dubey]

Thank you Hangyi thats very helpful.

Do you propose it is best to stick to 0.2 threshold? or there is another
lower but reliable threshold. My priorty is to get the most reproducible
results for mean tract diffusion parameters.

also what do you think will be more reliable for quantitative purposes,
using cut function to exclude the fiber edge or using the entire tract.

Also would like to hear your comments on eigen value1 and 2 and 2DFA2-3 and
2DFA1-3. And how these are computed, how specifically they differ from FA
and Trace.

Prachi
On Wed, Mar 6, 2013 at 12:36 PM, Hangyi Jiang <hjiang at jhmi.edu> wrote:

>
> personally,  I think 0.1 is too low to get reliable (or consistent) fiber
> tracking results.
>
> best,
>
> hangyi
>
>
>  ------------------------------
> *From:* mristudio-users-bounces at mristudio.org [
> mristudio-users-bounces at mristudio.org] on behalf of Prachi Dubey [
> pxd2010 at gmail.com]
> *Sent:* Wednesday, March 06, 2013 12:10 PM
> *To:* DTI Studio, ROI Editor, DiffeoMap Questions/Support
> *Subject:* [Mristudio-users] transverse diffusion parameters
>
>   Hi,
>
> Any thoughts on how low one could go on FA threshold for tracking without
> introducing too much noise. I am using FA=0.2, and a lot of my patients
> have very severely atropic tracts and it is excluding a lot of the data. I
> can track more fibers if go as low as 0.1 but that makes me worry if I am
> introducing tracking error.
>
> Also what has your experience been with transverse diffusion values, eigen
> value1 and 2 and 2DFA2-3 and 2DFA1-3. In my dataset they are more sensitive
> than FA or Trace.
>
> Any thoughts, comments appreciated. Prachi
>
> --
>
> Prachi Dubey, MD MPH
> ph:4109614841
>
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>


-- 

Prachi Dubey, MD MPH
ph:4109614841
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