Andreas is right.<div>So called ADC (average diffusion constant, apparent diffusion constant) and MD (mean diffusivity) are obtained by trace/3 (trace divided by 3), while the trace is (eigenvalue0+eigenvalue1+eigenvalue2).</div>
<div><br></div><div>also, axial diffusivity is same as eigenvalue0 and radial diffusivity is the average of eigenvalue1 and 2 [ (eigenvalue1+eigenvalue2)/2].<br><br><div class="gmail_quote">On Wed, Feb 23, 2011 at 8:31 AM, Andreas Buchmann <span dir="ltr"><<a href="mailto:buchmann2@wisc.edu">buchmann2@wisc.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Dear Yo,<br>
<br>
I'm using trace diffusivity, which is strongly related to mean diffusivity<br>
(I think, just multiplied with a constant factor, experts correct me if I'm<br>
wrong).<br>
<font color="#888888"><br>
Andreas<br>
</font><div class="im"><br>
<br>
<br>
-----Original Message-----<br>
From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
[mailto:<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>] On Behalf Of<br>
</div><div><div></div><div class="h5"><a href="mailto:107310@ib.k.u-tokyo.ac.jp">107310@ib.k.u-tokyo.ac.jp</a><br>
Sent: Dienstag, 22. Februar 2011 19:36<br>
To: DTI Studio, ROI Editor, DiffeoMap Questions/Support<br>
Subject: Re: [Mristudio-users] radial diffusivity, mean diffusivity<br>
<br>
Dear Andreas, Ryuzo and DTI experts<br>
<br>
<br>
I also try to calculate mean diffusivity.<br>
But in DTI studio, only the radial diffusivity and ADCs can calculate at<br>
the 'Image'-tab with ROI.<br>
<br>
Is there any function to measure mean diffusivity?<br>
Please give me any suggestion.<br>
<br>
Many thanks.<br>
<br>
<br>
YO<br>
<br>
<br>
> Dear Andreas<br>
><br>
><br>
><br>
> Thank you very much for your suggestion. I will try.<br>
><br>
><br>
><br>
> Ryuzo<br>
><br>
><br>
><br>
> From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
> [mailto:<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>] On Behalf Of Andreas<br>
Buchmann<br>
> Sent: Monday, February 21, 2011 11:03 PM<br>
> To: 'DTI Studio, ROI Editor, DiffeoMap Questions/Support'<br>
> Subject: Re: [Mristudio-users] radial diffusivity, mean diffusivity<br>
><br>
><br>
><br>
> Dear Ryuzo,<br>
><br>
><br>
><br>
> yes, you're on the right track with (1). After the estimation, DTI-<br>
Studio<br>
> appends the images to the list of images you have, and you can see<br>
them<br>
> under the 'Image'-tab and save them with right-click on the image.<br>
><br>
><br>
><br>
> Good luck<br>
><br>
> Andreas<br>
><br>
><br>
><br>
> _____<br>
><br>
> From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
> [mailto:<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>] On Behalf Of hanaie<br>
> Sent: Montag, 21. Februar 2011 07:46<br>
> To: <a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a><br>
> Subject: [Mristudio-users] radial diffusivity, mean diffusivity<br>
><br>
><br>
><br>
> Dear DTI experts<br>
><br>
><br>
><br>
> How can I do to obtain the radial diffusivity and mean diffusivity in<br>
DTI<br>
> studio?<br>
><br>
><br>
><br>
> 1. In the " Dti Map" tab, clicking "Tensor, color Map etc" button,<br>
and<br>
> checking the checkboxes "Radial", "Trace"<br>
><br>
><br>
><br>
> 2. After tensor calculation and fiber tracking, if I click "<br>
statistics"<br>
> button in the "Fiber" tab and<br>
><br>
> I choose the each image and click "go" button in the another window,<br>
can I<br>
> obtain radial and mean diffusivity?<br>
><br>
><br>
><br>
><br>
><br>
> Please give me any suggestion.<br>
><br>
><br>
><br>
> Many thanks.<br>
><br>
><br>
><br>
> Ryuzo<br>
><br>
><br>
><br>
><br>
> _______________________________________________<br>
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</div></div></blockquote></div><br></div>