Your question have two parts;<div><br></div><div>1) How to use the software to draw ROI: The ROI drawing function of DtiStudio is limited. I would suggest you to download RoiEditor from <a href="http://www.mristudio.org">www.mristudio.org</a>, which has more advanced ROI drawing functions.</div>
<div>2) How to anatomically define structures: White matter structures can be better identified by FA and color-coded maps. For gray matter structures, it depends. For the cortex, DTI may not have enough resolution to define it. Structures such as the caudate, thalamus, hippo, amyg could be better defined by b0 and diffusion-weighted images than FA.</div>
<div><br></div><div>You may want to learn automated segmentation tools using DiffeoMap and RoiEditor in <a href="http://www.mristudio.org">www.mristudio.org</a>, which can incorporate both FA and b0 images to define many brain structures automatically.</div>
<div><br></div><div>Susumu<br><br><div class="gmail_quote">On Thu, Aug 9, 2012 at 8:07 AM, 罗璐娇 <span dir="ltr"><<a href="mailto:lujiaoluo1990@126.com" target="_blank">lujiaoluo1990@126.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="line-height:1.7;font-size:14px;font-family:arial"><div style="line-height:1.7;font-size:14px;font-family:arial">
<div>Dear all,</div>
<div> It's my first time to process dti datas, and I am puzzled by how to draw a roi on a diffusion image.</div>
<div> I am wondering that how to select precisely the anatomical structures you want to analyze (e.g. amygdala, FFA, and V1) on a diffusion data? What should I do with dtistudio? Or do I need to look for some other softwares?</div>
<div> </div>
<div>Looking forward for your help and thanks so much!<br></div>
<div></div>
<div></div>
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