<p dir="ltr">Hi Manuel,</p>
<p dir="ltr">Can you post the output of 'mrinfo roi_CC1.mif' ? Would be good to also have some info as to how the image was generated. Hopefully that'll help to narrow down the problem...</p>
<p dir="ltr">Cheers,<br>
Donald</p>
<p dir="ltr">--<br>
Dr J-Donald Tournier (PhD)</p>
<p dir="ltr">Senior Lecturer, Biomedical Engineering<br>
Division of Imaging Sciences & Biomedical Engineering<br>
King's College London</p>
<p dir="ltr">A: Department of Perinatal Imaging & Health, 1st Floor South Wing, St Thomas' Hospital, London. SE1 7EH<br>
T: +44 (0)20 7188 7118 ext 53613<br>
W: <a href="http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering">http://www.kcl.ac.uk/medicine/research/divisions/imaging/departments/biomedengineering</a><br>
</p>
<div class="gmail_quote">On 4 Jun 2014 17:01, "Manuel Blesa Cábez" <<a href="mailto:mblesac@gmail.com">mblesac@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div><div><div><div>Hi all,<br><br></div>I have a strange problem, I'm sure is easy to solve but I'm stuck on this and I don't find the solution.<br><br></div>I want to calculate the tracks for a ROI, and when I run it I obtain the following message:<br>
<br>tckgen fod.mif tracks_CC1.tck -algorithm SD_STREAM -grad ag140128a_6_HARDI_WT_ref.b -seed_image roi_CC1.mif -mask mask.mif -number 1000<br><br>tckgen [ERROR]: Cannot use image roi_CC1.mif as ROI - image is empty<br><br>
</div>I opened the ROI and it looks ok, and is not "outside" of the fod map. I did the same, for another ROI and it works correctly. I don't know way this ROI has this problem, Somebody can help me? Maybe is due to the location of the ROI and the default parameters? Thanks in advance.<br>
<br></div>Best regards,<br><br></div>Manuel Blesa<br><div><div><div><br></div></div></div></div>
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