Sumei,<br><br>The number starts from 0 and ends as 15. So the total number of gradients is 16.<br>I recommend you following link for the gradient table of Philips system.<br><a id="iha-0" href="http://godzilla.kennedykrieger.org/%7Ejfarrell/OTHERphilips/GUI.html">http://godzilla.kennedykrieger.org/~jfarrell/OTHERphilips/GUI.html</a><br>
<br>To use the JAVA applet, you should have a JAVA run time environment (JRE) installed on your computer.<br><br>Good luck.<br><br>SC <br><br><div class="gmail_quote">On Wed, Jan 7, 2009 at 4:39 PM, Wang, Sumei <span dir="ltr"><<a href="mailto:Sumei.Wang@uphs.upenn.edu">Sumei.Wang@uphs.upenn.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div vlink="purple" link="blue" lang="EN-US">
<div><span><font size="2" face="Arial"><span>Hi all,</span></font></span></div>
<div>
<div><font size="2" face="Arial"><span></span></font> </div>
<div><span><font face="Arial"><font size="2">Does anybody
have 16 direction gradient table (medium) for Philips system? I search<span>ed</span> the forum and just got 15 dir gradi<span>ent table as follows.</span></font></font></span></div>
<div><span><font face="Arial"><font size="2"><span></span></font></font></span> </div>
<div><span><font face="Arial"><font size="2"><span>Thanks for your help.</span></font></font></span></div>
<div><span><font face="Arial"><font size="2"><span></span></font></font></span> </div>
<div><span><font face="Arial"><font size="2"><span>Sumei</span></font></font></span></div></div>
<blockquote dir="ltr" style="margin-right: 0px;">
<div dir="ltr" align="left"><font size="2" face="Tahoma">-----Original Message-----<br><b>From:</b>
<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>
[mailto:<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>]<b>On Behalf Of
</b>susumu<br><b>Sent:</b> Friday, July 25, 2008 7:13 AM<br><b>To:</b> 'DTI
Studio, ROI Editor, Landmarker Questions/Support'<br><b>Subject:</b> Re:
[Mristudio-users] Philips gradient tables<br><br></font></div>
<div>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">Seongjin,</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">In Philips, there are
3 types (low: 6, medium: 15, high: 32) x 2 (overplus on/off) = 6 gradient
tables.</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">The "gradient
overplus = on" always use at least two gradients to enhance b efficiency and
therefore gaining several millisecond of echo time. In your example, the low
and high is "overplus = off" and the medium is "overplus = on". You can see
"1, 0, 0" in the first two but not in the medium.
</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">The medium with
"overplus = off" should look like;</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
0: 0,
0, 0</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
1: 1, 0,
0</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
2: 0, 1,
0</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
3: 0, 0,
1</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
4: -0.0424,-0.1146,-0.9925 </span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
5: 0.1749,-0.2005,-0.9639</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
6: 0.2323,-0.1626,-0.9590</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
7: 0.3675,0.0261,-0.9296
</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
8: 0.1902,0.3744,-0.9076</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
9:
-0.1168,0.8334,-0.5402
</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
10: -0.2005,0.2527,-0.9466</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
11: -0.4958,0.1345,-0.8580</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
12: -0.0141,-0.6281,-0.7780</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
13: -0.7445,-0.1477,-0.6511</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
14: -0.7609,0.3204,-0.5643</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
15: -0.1809,0.9247,-0.33510</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
16: -0.6796,-0.4224,-0.5997</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
17:
0.7771,0.4707,-0.4178</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
18: 0.9242,-0.1036,-0.3677</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
19: 0.4685,-0.7674,-0.4378</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
20: 0.8817,-0.1893,-0.4322</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
21: 0.6904,0.7062,-0.1569</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
22: 0.2391,0.7571,-0.6080</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
23: -0.0578,0.9837,0.1703</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
24: -0.5368,0.8361,-0.1135</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
25: -0.9918,-0.1207,-0.0423</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
26: -0.9968,0.0709,-0.0379</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
27: -0.8724,0.4781,-0.1014</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
28: -0.2487,0.9335,0.2581</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
29: 0.1183,0.9919,-0.0471</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
30: 0.3376,0.8415,0.4218</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
31: 0.5286,0.8409,0.1163</span></font></p>
<p><font size="2" face="Courier New"><span style="font-size: 10pt; font-family: 'Courier New';">
32: 0.9969,0.0550,-0.0571</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">In general, I do not
recommend to user "overplus = on", because tensor calculation get complicated
when oblique planes are used. You have to recalculate the table based on the
image angles.</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">Also, please note
that the "0, 0, 0" could be the first or the last image depending on how you
specify the output files.</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;">Susumu</span></font></p>
<p><font color="navy" size="2" face="Arial"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p>
<div>
<div style="text-align: center;" align="center"><font size="3" face="Times New Roman"><span style="font-size: 12pt;">
<hr align="center" size="2" width="100%">
</span></font></div>
<p><b><font size="2" face="Tahoma"><span style="font-weight: bold; font-size: 10pt; font-family: Tahoma;">From:</span></font></b><font size="2" face="Tahoma"><span style="font-size: 10pt; font-family: Tahoma;">
<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>
[mailto:<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>] <b><span style="font-weight: bold;">On Behalf Of </span></b>[Seongjin]<br><b><span style="font-weight: bold;">Sent:</span></b> Wednesday, July 23, 2008 3:47
PM<br><b><span style="font-weight: bold;">To:</span></b> DTI Studio, ROI
Editor, Landmarker Questions/Support<br><b><span style="font-weight: bold;">Subject:</span></b> [Mristudio-users] Philips
gradient tables</span></font></p></div>
<p><font size="3" face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
<div>
<p><font size="3" face="Times New Roman"><span style="font-size: 12pt;">Dear DTIstudio users,<br><br>I wonder if you have
gradient tables for Philips Achieva system.<br><br>>From a source I have a
gradient table for low resolution as follows:<br><br>0:1.0000, 0.0000,
0.0000<br>1:0.0000, 1.0000, 0.0000<br>2:0.0000, 0.0000,
1.0000<br>3:-0.7044, -0.0881, -0.7044<br>4:0.7044, 0.7044,
0.0881<br>5:0.0881, 0.7044, 0.7044<br>6:0.0000, 0.0000,
0.0000<br><br><br>For medium,<br><br>0: 0.7071 -0.7071 1.00<br>1:
0.7071 -0.7071 -1.00<br>2: 1.0000 1.0000 0.0000<br>3: 0.9999
-0.1561 0.9879<br>4: 0.9894 0.4091 0.9240<br>5: 0.4674
0.8874 0.9970<br>6: 0.3866 0.9297 0.9930<br>7: 0.7667
-0.9511 0.7124<br>8: 0.6945 0.9954 -0.7295<br>9: 0.3580
-0.9800 -0.9547<br>10: 1.0000 -0.9992 -0.0392<br>11: 0.9999
-0.3989 -0.9171<br>12: 0.9923 0.4082 -0.9213<br>13: 0.9989
0.9982 -0.0759<br>14: 0.2899 0.9919 -0.9655<br>15: 0.0000
0.0000 0.0000<br><br><br>For high,<br><br> 0: 1.000, 0.000, 0.000<br> 1: 0.000, 1.000, 0.000<br> 2: 0.000, 0.000,
1.000<br> 3: -0.042, -0.115, -0.993<br> 4: 0.175,
-0.200, -0.964<br> 5: 0.232, -0.163, -0.959<br> 6:
0.368, 0.026, -0.930<br> 7: 0.190, 0.374, -0.908<br> 8: -0.117, 0.833, -0.540<br> 9: -0.200, 0.253,
-0.947<br> 10: -0.496, 0.134, -0.858<br> 11:
-0.014, -0.628, -0.778<br> 12: -0.744, -0.148, -0.651<br> 13: -0.761, 0.320, -0.564<br> 14: -0.181,
0.925, -0.335<br> 15: -0.680, -0.422, -0.600<br> 16: 0.777, 0.471, -0.418<br> 17: 0.924, -0.104,
-0.368<br> 18: 0.468, -0.767, -0.438<br> 19:
0.882, -0.189, -0.432<br> 20: 0.690, 0.706, -0.157<br> 21: 0.239, 0.757, -0.608<br> 22: -0.058, 0.984,
0.170<br> 23: -0.537, 0.836, -0.113<br> 24:
-0.992, -0.121, -0.042<br> 25: -0.997, 0.071, -0.038<br> 26: -0.872, 0.478, -0.101<br> 27: -0.249,
0.933, 0.258<br> 28: 0.118, 0.992, -0.047<br> 29: 0.338, 0.841, 0.422<br> 30: 0.529, 0.841,
0.116<br> 31: 0.997, 0.055, -0.057<br> 32:
0.000, 0.000, 0.000<br><br><br>I wonder if the tables above are
correct or not. Is there anything incorrect or partially incomplete, please
let me know.<br>Thanks in advance.<br><br>Sincerely,<br>Seongjin
</span></font></p></div></div></blockquote></div>
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