What you wrote doesn't make sense to me.<div>"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).</div>
<div><br></div><div>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.<br><br><div class="gmail_quote">
On Tue, Jun 5, 2012 at 6:52 PM, Fatemeh Derakhshan <span dir="ltr"><<a href="mailto:fatemeh.derakhshan@gmail.com" target="_blank">fatemeh.derakhshan@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>Hi DTI experts</div>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!<div>
Thanks <span class="HOEnZb"><font color="#888888"><br clear="all"><div><br></div>-- <br>Fatemeh Derakhshan<br>
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