[Mristudio-users] which is flip eigen vector

[Susumu Mori]

Hi Huiyan,

Please read page 22 of the manual here (
https://www.mristudio.org/wiki/user_manual). There is an explanation.
Unfortunately, there is no way to say what are the correct +/- signs of
your table simply from the table you showed.

Susumu


On Sun, Dec 15, 2013 at 9:54 PM, Shao, Huiyan <huiyan.shao at ttu.edu> wrote:

>   Dear DTIstudio experts,
>
>  I'm trying to do fiber tracking with DTIstudio. For the fiber tracking
> step, I am not sure which is our flip eigen vector. Below is our gradient
> table:
>
>  0:0.000000,0.000000,0.000000
> 1:0.539633,-0.488234,0.685874
> 2:0.453954,-0.517350,-0.725448
> 3:-0.709025,-0.702831,0.057543
> 4:0.693686,-0.259787,0.671797
> 5:0.248036,-0.662131,0.707149
> 6:0.019995,-0.691995,0.721626
> 7:-0.380197,-0.550811,0.743005
> 8:-0.646518,-0.136320,0.750621
> 9:0.693879,-0.259861,0.671569
> 10:0.328108,-0.695394,0.639353
> 11:-0.258199,-0.691285,0.674877
> 12:-0.473483,-0.468429,0.745914
> 13:-0.668140,-0.275451,0.691170
> 14:0.735513,-0.465660,0.492119
> 15:0.500260,-0.698858,0.511212
> 16:-0.525531,-0.629740,0.572053
> 17:-0.676078,-0.457433,0.577645
> 18:0.702589,-0.711054,-0.027771
> 19:0.671769,-0.487322,-0.557893
> 20:-0.739823,-0.479095,-0.472367
> 21:-0.506710,-0.715022,-0.481652
> 22:0.702079,-0.711198,-0.035815
> 23:0.594285,-0.442036,-0.671885
> 24:0.698207,-0.711120,-0.082559
> 25:0.250124,-0.721895,-0.645218
> 26:-0.334558,-0.718487,-0.609793
> 27:-0.709479,-0.702971,0.049709
> 28:-0.746124,-0.301952,-0.593401
> 29:0.698770,-0.711214,-0.076781
> 30:-0.080715,-0.720450,-0.688794
> 31:-0.709677,-0.703022,0.046037
> 32:-0.748640,-0.010444,-0.662895
>
>  Can you decide which is our flip eigen vector?
>
>  Huiyan
>
>
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