1) Please read your REC file using Mri3DView. Use the image dimensions you get from the PAR file.<div>2) After the images are read, please go through the images using the pull-down menu in the right column of the viewing window. Check if all the images (b0 and DWIs) look fine.</div>
<div>3) Find out how many 3D images are loaded. If you used Philips "High" gradient orientation, you should have 34 images loaded; one b0, 32 DWIs, and one calculated DWIs (I think this is the sum of all DWIs).</div>
<div>4) Make sure where is b0. It could be the first or the second from the last. The calculated DWI is always at the end.</div><div>5) Close the window and start DtiMapping.</div><div>6) Cut&Paste your gradient table to the appropriate section. You have to make sure several things here;</div>
<div>a: The position of b0; First or the second from the last</div><div>b: The number of rows; It has to be 34. Sometimes you find a table with only 33 lines ignoring the last calculated image. In this case, you get the error message, complaining that the file size doesn't match. Because the last image is not used anyway, you can ignore the message and proceed. The last image is thrown away. Or, you can increase the number of row to 34 by adding 33: 100, 100, 100, in which [100, 100, 100] send the message to DtiStudio to remove this image.</div>
<div>c: Please make sure if you used "gradient overplus ON" or "OFF", because you have to use different tables.</div><div>7) If you still get the file size error message, something is wrong.<br><br><div class="gmail_quote">
On Tue, Nov 23, 2010 at 5:21 PM, Dresner, Alex <span dir="ltr"><<a href="mailto:alex.dresner@philips.com">alex.dresner@philips.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="EN-US" link="blue" vlink="purple">
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Dear Chunxiao,
</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Your gradient table is also in the .PAR file. You should be able to read the .PAR file with any text reader such as WordPad, NotePad or Word; lower in the
file is a table of parameters per-image. On the right-hand-side of that table are the diffusion directions in three columns.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Regards,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Alex</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">____________________</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">M. Alex Dresner, Ph.D.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">MR Clinical Scientist</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><a href="mailto:alex.dresner@philips.com" target="_blank">alex.dresner@philips.com</a></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">____________________</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"> </span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt">From:</span></b><span style="font-size:10.0pt"> <a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a> [mailto:<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>]
<b>On Behalf Of </b>Chunxiao Zhou<br>
<b>Sent:</b> Tuesday, November 23, 2010 5:07 PM<br>
<b>To:</b> <a href="mailto:mristudio-users@mristudio.org" target="_blank">mristudio-users@mristudio.org</a><br>
<b>Subject:</b> [Mristudio-users] Gradient Table for Philips</span></p>
</div><div><div></div><div class="h5">
<p class="MsoNormal"> </p>
<div>
<p class="MsoNormal">Hello,</p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal">When I do tensor calculation for my own data , there is a warning message "File size is bigger than DW-image size, continue anyway?". I get all image size parameters from my .par file ( I use Philip .REC .PAR data). I guess the reason is
that I use the default <span lang="EN">ParRec gradient table from your GradientTable file. How could I get my gradient table from my file?
</span></p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"><span lang="EN">Thank you.</span></p>
</div>
<div>
<p class="MsoNormal"> </p>
</div>
<div>
<p class="MsoNormal"><span lang="EN">Chunxiao(Andrew)</span></p>
</div>
</div></div></div>
<br>
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