[Mristudio-users] orientation and direction!

[susumu mori]

What you wrote doesn't make sense to me.
"direction" and "orientation" are the same thing. So, if your protocol uses
"30 different directions", that is "30 different orientations", not "six
different orientations". To do DTI you need at least 6 directions
(orientations).

>From these measurements, a vector (fiber orientation) can be measured for
each pixel. The unit vector has x, y, z components, which is visualized by
the three principal colors.

On Tue, Jun 5, 2012 at 6:52 PM, Fatemeh Derakhshan <
fatemeh.derakhshan at gmail.com> wrote:

> Hi DTI experts
> This might be a basic question; but I wonder how orientation and direction
> are different in DTI. My protocol says that we uses "30 different
> directions" to acquire DTI gradients along "six different orientations" and
> then we have three colors to code the directions of diffusion. Can anyone
> kindly explain it please!
> Thanks
>
> --
> Fatemeh Derakhshan
>
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