Hi Yuan,<div><br></div><div>Yes, the first one has to be OR. Otherwise, you can't initiate a tracking.</div><div>I think your question can be simplified as;</div><div><br></div><div>> suppose you have two ROIs, say A and B</div>
<div>> if you set ROI A first, it becomes "OR" and B becomes "AND"</div><div>> if you set ROI B first, it becomes "OR" and A becomes "AND"</div><div>> question is, whether these two results are different or not. </div>
<div>This is a good question. I assume these should be the same. Have you seen difference in this kind of simple cases?<br><br><div class="gmail_quote">On Tue, Jul 17, 2012 at 5:12 PM, yuan liu <span dir="ltr"><<a href="mailto:liuyuan0322@gmail.com" target="_blank">liuyuan0322@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<div><br></div><div>I have a question about the ROI sequence in the binary map loaded in DTI Studio. Is the first ROI has to be an "OR" ROI? I have five ROIs, one "OR", three "AND", one "NOT". It seems that if I put "OR" ROI at different place in the binary map (e.g., be the first one or second one), the fiber results are different. This is really confusing to me.</div>
<div><br></div><div>Thanks,</div><div><br></div><div>Best,</div><div>Yuan<br><br>
</div>
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