Hi Juliette,<br><br>We have been working on the gradient information inside DICOM. We start to understand Siemens but haven't finished Philips yet. This is a rather tricky issue and we have to be careful.<br><br>Meanwhile, if you are using the standard "Low, Medium, High" gradient set, you can use the table provided from Philips.<br>
The latest DtiStudio has some pre-defined gradient table installed from which you can choose.<br><br>However, this list contains only the tables that are used most frequently.<br>Strictly speaking, there are 48 tables for Philips (although many of them are redundant), because there are combination of;<br>
<br>3 tables (6, 15, 32 orientations)<br>Gradient overplus (on / off)<br>4 different releases (many releases share the same tables but not all)<br>location of b0 image (beginning or end)<br><br>On top of it, if you use gradient overplus = on (We DO NOT recommend this option = on), the table becomes sensitive to oblique angles.<br>
<br>To solve all these issues at once, I recommend you to look into <a href="http://godzilla.kennedykrieger.org/~jfarrell/OTHERphilips/GUI.html">http://godzilla.kennedykrieger.org/~jfarrell/OTHERphilips/GUI.html</a>.<br>This nice software written by Jonathan Farrell can create a table for all possible combination. <br>
<br>Susumu<br>
<br><div class="gmail_quote">On Wed, May 26, 2010 at 6:37 AM, Juliette Charpentier <span dir="ltr"><<a href="mailto:charpentier.juliette@gmail.com" target="_blank">charpentier.juliette@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="gmail_quote"><pre><pre><font style="font-family: verdana,sans-serif;" size="2">Hello all,<br><br>In order to use DtiStudio properly, it seems that one needs a gradient table to go along with their data. Our lab is currently using a Philips MR Imaging. <br>
Within the dicom header of scanner, under the tag “DiffusionGradientOrientation”, able to find the x,y,z information but it not seems to be correct.<br><br>Is there a program that can generate gradient tables to go along with our dicom data, or can it be found on Philips website? <br>
<br>Thank you very much for all of your help, it is much appreciated.<br><br>Sincerely,</font><font size="2"><br><br></font><font style="font-family: trebuchet ms,sans-serif;" size="2">Juliette Charpentier</font><br><br>
</pre>
<br></pre>
</div><br>
<br>_______________________________________________<br>
Mristudio-users mailing list<br>
<a href="mailto:Mristudio-users@mristudio.org" target="_blank">Mristudio-users@mristudio.org</a><br>
<a href="http://lists.mristudio.org/mailman/listinfo/" target="_blank">http://lists.mristudio.org/mailman/listinfo/</a><br>
Unsubscribe, send a blank email to: <a href="mailto:Mristudio-users-unsubscribe@mristudio.org" target="_blank">Mristudio-users-unsubscribe@mristudio.org</a><br>
<br></blockquote></div><br>