Hi Mark,<br><br>If you are using the standard Siemens 12-orientation scheme or other pre-defined tables available in the scanner, we have a file that contains all tables. It seems that Siemens Mosaic/Dicom contains some gradient orientation information, but we still haven't completely figured out how to use them. There are several important points you need to know.<br>
<br>1) Here is the usual 12 orientations in DtiStudio format (you can cut&paste);<br>0: 0, 0, 0<br>1: 1.000000, 0.414250, -0.414250 <br>2: 1.000000, -0.414250, -0.414250 <br>3: 1.000000, -0.414250, 0.414250 <br>4: 1.000000, 0.414250, 0.414250<br>
5: 0.414250, 0.414250, 1.000000<br>6: 0.414250, 1.000000, 0.414250<br>7: 0.414250, 1.000000, -0.414250<br>8: 0.414250, 0.414250, -1.000000<br>9: 0.414250, -0.414250, -1.000000<br>10: 0.414250, -1.000000, -0.414250<br>
11: 0.414250, -1.000000, 0.414250<br>12: 0.414250, -0.414250, 1.000000<br><br>2) Some old operating system uses different types of the tables. So the current table may not work. If you find a problem with the above table, please let us know.<br>
<br>3) If you are using another pre-defined table, please refer to the attached file. This lists all the tables in VB13 (and after, I believe). You need to convert the format to DtiStudio format. If you look at the 20-orientation scheme in the file, you can find that I converted the Siemens format to the DtiStudio format.<br>
<br>4) Unless you are using VB15, the gradient table needs to be recalculated when you use oblique-plane imaging. VB15 does it automatically and you don't have to worry. With older operating systems, you need to click "Rotate Gradient if Applicable" checkbox in the initial parameter input window of DtiStudio.<br>
<br>Susumu<br><br><div class="gmail_quote">2010/4/29 wgh0805 <span dir="ltr"><<a href="mailto:wgh0805@126.com">wgh0805@126.com</a>></span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>Dear all:</div>
<div> </div>
<div>
<div> I have the data of <span style="font-size: 10pt; font-family: 'Times New Roman';" lang="EN-US"><b>Siemens DICOM</b></span> ,but I can not find the gradient table for it. How can I find it?</div>
<div>Thanks ,</div>
<div><br></div>
<div>Mark<br><br></div></div><br><br><span title="neteasefooter"></span><hr>
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