We have a 3T GE scanner with an 8 channel head coil and parallel imaging...we can get 2.6 mm isotropic voxels (best we can do)...and we can do 25 directions and 3 B0s in 14.5 minutes.<br>We turn off upscanning and use a 128x128 matrix and 58 slices.
<br><br>-Dianne<br><br><div><span class="gmail_quote">On 7/2/07, <b class="gmail_sendername">Agnieszka Burzynska</b> &lt;<a href="mailto:[log in to unmask]"><a href="/cgi-bin/wa-jisc.exe?LOGON=A3%3Dind0707%26L%3DFSL%26E%3D7bit%26P%3D50069%26B%3D------%253D_Part_78856_7437637.1183398051221%26T%3Dtext%252Fhtml%3B%2520charset%3DISO-8859-1%26pending%3D" target="_parent" >[log in to unmask]</a></a>&gt; wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">




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<font face="Verdana, Helvetica, Arial"><span style="font-size: 12px;">Dear Manish,<br>
I am not an expert, too, but I think some useful information for you can be found in diffusion FAQ on FSL website. You have to find a reasonable compromise between the resolution (2.5mm3 or better), number of repetitions, number of different DW gradients and non-DW measurements, etc. I work on 
1.5 T, so for a start, I recommend you go to literature and check what is the standard for 3T and what are the solutions, and compare them with what is available for you. <br>
Hope it helps a bit,<br>
Best,<br>
Aga<br>
<br>
<br>
On 02.07.2007 17:19 Uhr, &quot;Manish Dalwani&quot; &lt;<a href="mailto:[log in to unmask]" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)"><a href="/cgi-bin/wa-jisc.exe?LOGON=A3%3Dind0707%26L%3DFSL%26E%3D7bit%26P%3D50069%26B%3D------%253D_Part_78856_7437637.1183398051221%26T%3Dtext%252Fhtml%3B%2520charset%3DISO-8859-1%26pending%3D" target="_parent" >[log in to unmask]</a></a>&gt; wrote:<br>
<br>
</span></font><blockquote><font face="Verdana, Helvetica, Arial"><span style="font-size: 12px;">Dear FSL&#39;ers,<br>
<br>
I am new to DTI and need some information about it. We are using a 3T GE MRI scanner and let&#39;s say we want to reduce the scan time to less 15 mins...to look at tracts in the frontal regions. What would be the best pulse sequence? 
<br>
<br>
Also, can anyone tell me what (ideal) software and hardware for DTI and tractography would I need? <br>
<br>
Kindly advise! <br>
<br>
Manish Dalwani<br>
PRA<br>
UCHSC<br>
<br>
&nbsp;<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Dianne Patterson, Ph.D.<br><a href="mailto:[log in to unmask]"><a href="/cgi-bin/wa-jisc.exe?LOGON=A3%3Dind0707%26L%3DFSL%26E%3D7bit%26P%3D50069%26B%3D------%253D_Part_78856_7437637.1183398051221%26T%3Dtext%252Fhtml%3B%2520charset%3DISO-8859-1%26pending%3D" target="_parent" >[log in to unmask]</a></a><br>ERP Lab<br>University of Arizona<br>621-3256 (Office)