Dear Susumu,<br><br>I am a new student to the field of MR imaging. As of now, I am doing a research where I have used SPM and DTI Studio to coregister and normalize the images. I used the JHU parcellation in MRI Cro to extract the various regions of interest. Now I have certain parameters such as ROI n, mean and ROI SD. Could you please let me know a way to calculate FA, ADC values so that I could draw various conclusions and comparisons. <br>
<br>Regards,<br>Ravi<br><br><div class="gmail_quote">On Fri, Jun 22, 2012 at 3:56 PM, susumu mori <span dir="ltr"><<a href="mailto:susumu@mri.jhu.edu" target="_blank">susumu@mri.jhu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
well, you can always do image-domain interpolation. I'm not sure if it looks as pretty as the time-domain interpolation by scanners. Some people say that they are the same thing.<div><br></div><div>One thing I can comment is, if you will use our atlas-based pipeline for image quantification, regardless of your image resolution, they are all resampled to 1x1x1 mm / 181x217x181, as defined by the MNI coordinates. So, you can just proceed to our MriStudio pipeline without any interpolation. You feed in your 2.5 mm resolution data and 1mm data will come out.<div>
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<br><div class="gmail_quote">On Fri, Jun 22, 2012 at 9:29 AM, Jiang, Jie <span dir="ltr"><<a href="mailto:jie.jiang@emory.edu" target="_blank">jie.jiang@emory.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div style="direction:ltr;font-size:10pt;font-family:Tahoma">Thanks for the response. So you mean I have to do this when I was doing the scan and there is no way to optimize the images during the processing?Thanks<br>
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<div style="direction:ltr"><font color="#000000" face="Tahoma"><b>From:</b> <a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a> [<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>] on behalf of susumu mori [<a href="mailto:susumu@mri.jhu.edu" target="_blank">susumu@mri.jhu.edu</a>]<br>
<b>Sent:</b> Thursday, June 21, 2012 6:17 PM<br>
<b>To:</b> DTI Studio, ROI Editor, DiffeoMap Questions/Support<br>
<b>Subject:</b> Re: [Mristudio-users] FA map problem<br>
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<div>I recommend to do 2x interpolation (time-domain, not image-domain interpolation, also called zerofilling or zeropadding) at the data acquisition. Unfortunately, you have to do this in the scanner.<br>
<br>
<div class="gmail_quote">On Thu, Jun 21, 2012 at 5:55 PM, Jiang, Jie <span dir="ltr">
<<a href="mailto:jie.jiang@emory.edu" target="_blank">jie.jiang@emory.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div style="direction:ltr;font-size:10pt;font-family:Tahoma">Dear all,<br>
I am using DTIStudio to get the FA image. The primary images are ok. However, after calculating, the FA maps are always much blur with pretty low resolution. Does anyone know how to improve the resolution or any suggestion? Thanks a lot.<br>
Best,<br>
Jie<br>
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