Hi Duke,<br><br>I'm not sure if this answers your question, but there is an interpolation issue. When a line is drawn for manual ROI, the line could be narrower or larger than a pixel, depending on the choice of "pen width". When the software convert it to the pixel-by-pixel binary information, it has to judge which pixel to include. For example, if the center of the line is at a pixel coordinate 1.5, it has to judge if ROI is only up to pixel 1 or 2. If 1 is chosen, the selected pixels always look shifted to the left. Do you think your issue is related to this?<br>
<br><div class="gmail_quote">On Tue, Sep 1, 2009 at 12:20 PM, Shereen, Ahmed (shereeda) <span dir="ltr"><<a href="mailto:shereeda@mail.uc.edu">shereeda@mail.uc.edu</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;">
Hello,<br>
Thank you for your reply. I think I found a quick workaround. The pixels that weren't included belonged to other ROIs. So, I deleted them and when I tried again the original ROI was able to include the pixels that previously overlapped with the ROI I had deleted. However, am I missing something here? I would imagine that I should be able to have multiple ROIs with some overlap?<br>
thanks again,<br>
Duke<br>
________________________________________<br>
From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a> [<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>] on behalf of Xin Li [<a href="mailto:xli16@jhmi.edu">xli16@jhmi.edu</a>]<br>
Sent: Monday, August 31, 2009 9:47 AM<br>
To: DTI Studio, ROI Editor, Landmarker Questions/Support<br>
Subject: Re: [Mristudio-users] units?<br>
<br>
Hello,<br>
<br>
After you push the Add button, only the contour of the ROI displays.<br>
<br>
But you said that the number of pixels does not increase from the statistics gui. Could you give me some details about this problem, for example some screenshots and the statitics file?<br>
<br>
<br>
Xin<br>
<br>
<br>
----- Original Message -----<br>
From: "Shereen, Ahmed (shereeda)" <<a href="mailto:shereeda@mail.uc.edu">shereeda@mail.uc.edu</a>><br>
Date: Friday, August 28, 2009 6:52 pm<br>
Subject: Re: [Mristudio-users] units?<br>
To: "DTI Studio, ROI Editor, Landmarker Questions/Support" <<a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a>><br>
<br>
<br>
> Thank you,<br>
><br>
> I have another question. Sometimes when I draw ROIs not all of the<br>
> pink pixels become part of the ROI object when I push the (Add(a))<br>
> button. I check the statistics box to double check that it is not<br>
> just a visual misplacement. The number of pixels also does not<br>
> increase from the statistics gui, although extra pixels were selected<br>
> prior to pushing Add(a).<br>
><br>
> Any ideas?<br>
> Again, thank you,<br>
> Duke<br>
> ________________________________________<br>
> From: <a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a><br>
> [<a href="mailto:mristudio-users-bounces@mristudio.org">mristudio-users-bounces@mristudio.org</a>] on behalf of Xin Li [<a href="mailto:xli16@jhmi.edu">xli16@jhmi.edu</a>]<br>
> Sent: Friday, August 28, 2009 4:14 PM<br>
> To: DTI Studio, ROI Editor, Landmarker Questions/Support<br>
> Subject: Re: [Mristudio-users] units?<br>
><br>
> Hello,<br>
><br>
> The current version of ROIEditor reports the statistical result as<br>
> four decimal precision. When your eigenvalue data are very small, this<br>
> problem happens. You may scale the eigenvalue data before the<br>
> statistical caculation.<br>
><br>
> Xin<br>
><br>
> ----- Original Message -----<br>
> From: "Shereen, Ahmed (shereeda)" <<a href="mailto:shereeda@mail.uc.edu">shereeda@mail.uc.edu</a>><br>
> Date: Friday, August 28, 2009 1:26 pm<br>
> Subject: [Mristudio-users] units?<br>
> To: "<a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a>" <<a href="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</a>><br>
><br>
><br>
> > Hello,<br>
> > I have a problem which I think has to do with the units for the<br>
> > eigenvalues calculated in ROIEditor. Basically, when I draw ROIs,<br>
> > save them, and then load them into the FA image, everything works<br>
> > fine. When I then load the eigenvalue images, the ROIs that gave me<br>
> > good FA values give me the same eigenvalues for all ROIs. I'm<br>
> > attaching the ROI data file. Has anybody seen anything like this?<br>
> > Thank you,<br>
> > Duke<br>
> > _______________________________________________<br>
> > Mristudio-users mailing list<br>
> > <a href="mailto:Mristudio-users@mristudio.org">Mristudio-users@mristudio.org</a><br>
> ><br>
> > Unsubscribe, send a blank email to: <a href="mailto:Mristudio-users-unsubscribe@mristudio.org">Mristudio-users-unsubscribe@mristudio.org</a><br>
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</blockquote></div><br>