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<TITLE>Re: mristudio : strange ROI image (my message has not been accepted on the list)</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>HI Josselin,<BR>
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I have encountered the same issue- it seems that, in one of the steps used to transform an ROI template into another space, the ROIs do not remain intact. That is, as your pic shows, some of the pixels within each ROI end up elsewhere in the brain.<BR>
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The only solution I can think of (and I haven’t tried it yet) is to “clean up” the ROI, that is, use the ROI tools to select and “subtract” the pixels that are outside the ROI.<BR>
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Perhaps someone else on the list has successfully accomplished creating “clean” ROIs from a transformed template and can comment/assist.<BR>
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Susumu- I’m wondering if you’ve examined whether the mean FA, other stats obtained from transformed ROI templates are affected by the displaced pixels?<BR>
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Thanks,<BR>
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Julie<BR>
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On 7/22/10 4:54 AM, "Josselin" <<a href="j.houenou@yahoo.fr">j.houenou@yahoo.fr</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Hello,<BR>
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I am sending this email directly to you because the list refused it, probably because of the joint file.<BR>
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Using Diffeomap, I use a WMPM_type_II_atlas and registered it on my native FA image through LDDMM and Air. First, it looked fine<BR>
But when I looked deeper and tried to extract only one ROI (the first one): here is the result I got: (joint jpg file). The core of the ROI seems ok but it also includes many alien points. Do you have any idea ?<BR>
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thanks,<BR>
Josselin Houenou<BR>
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