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<DIV><SPAN class=336393721-07012009><FONT face=Arial size=2><SPAN
class=317173321-07012009>Hi all,</SPAN></FONT></DIV>
<DIV>
<DIV><FONT face=Arial size=2><SPAN
class=317173321-07012009></SPAN></FONT> </DIV>
<DIV><SPAN class=317173321-07012009><FONT face=Arial><FONT size=2>Does anybody
have 16 direction gradient table (medium) for Philips system? I search<SPAN
class=336393721-07012009>ed</SPAN> the forum and just got 15 dir gradi<SPAN
class=336393721-07012009>ent table as follows.</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=317173321-07012009><FONT face=Arial><FONT size=2><SPAN
class=336393721-07012009></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=317173321-07012009><FONT face=Arial><FONT size=2><SPAN
class=336393721-07012009>Thanks for your help.</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=317173321-07012009><FONT face=Arial><FONT size=2><SPAN
class=336393721-07012009></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=317173321-07012009><FONT face=Arial><FONT size=2><SPAN
class=336393721-07012009>Sumei</SPAN></FONT></FONT></SPAN></DIV></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
mristudio-users-bounces@mristudio.org
[mailto:mristudio-users-bounces@mristudio.org]<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 class=Section1>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Seongjin,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><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.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><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.
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">The medium with
"overplus = off" should look like;<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
0: 0,
0, 0<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
1: 1, 0,
0<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
2: 0, 1,
0<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
3: 0, 0,
1<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
4: -0.0424,-0.1146,-0.9925 <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
5: 0.1749,-0.2005,-0.9639<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
6: 0.2323,-0.1626,-0.9590<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
7: 0.3675,0.0261,-0.9296
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
8: 0.1902,0.3744,-0.9076<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
9:
-0.1168,0.8334,-0.5402
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
10: -0.2005,0.2527,-0.9466<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
11: -0.4958,0.1345,-0.8580<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
12: -0.0141,-0.6281,-0.7780<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
13: -0.7445,-0.1477,-0.6511<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
14: -0.7609,0.3204,-0.5643<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
15: -0.1809,0.9247,-0.33510<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
16: -0.6796,-0.4224,-0.5997<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
17:
0.7771,0.4707,-0.4178<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
18: 0.9242,-0.1036,-0.3677<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
19: 0.4685,-0.7674,-0.4378<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
20: 0.8817,-0.1893,-0.4322<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
21: 0.6904,0.7062,-0.1569<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
22: 0.2391,0.7571,-0.6080<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
23: -0.0578,0.9837,0.1703<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
24: -0.5368,0.8361,-0.1135<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
25: -0.9918,-0.1207,-0.0423<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
26: -0.9968,0.0709,-0.0379<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
27: -0.8724,0.4781,-0.1014<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
28: -0.2487,0.9335,0.2581<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
29: 0.1183,0.9919,-0.0471<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
30: 0.3376,0.8415,0.4218<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
31: 0.5286,0.8409,0.1163<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
32: 0.9969,0.0550,-0.0571<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><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.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><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.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Susumu<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<DIV class=MsoNormal style="TEXT-ALIGN: center" align=center><FONT
face="Times New Roman" size=3><SPAN style="FONT-SIZE: 12pt">
<HR tabIndex=-1 align=center width="100%" SIZE=2>
</SPAN></FONT></DIV>
<P class=MsoNormal><B><FONT face=Tahoma size=2><SPAN
style="FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT
face=Tahoma size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">
mristudio-users-bounces@mristudio.org
[mailto:mristudio-users-bounces@mristudio.org] <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><o:p></o:p></P></DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoNormal><FONT face="Times New Roman" size=3><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 id=u3ia>1:0.0000, 1.0000, 0.0000<BR id=u3ia0>2:0.0000, 0.0000,
1.0000<BR id=u3ia1>3:-0.7044, -0.0881, -0.7044<BR id=u3ia2>4:0.7044, 0.7044,
0.0881<BR id=u3ia3>5:0.0881, 0.7044, 0.7044<BR id=u3ia4>6:0.0000, 0.0000,
0.0000<BR><BR><BR>For medium,<BR><BR>0: 0.7071 -0.7071 1.00<BR id=uo8j>1:
0.7071 -0.7071 -1.00<BR id=uo8j0>2: 1.0000 1.0000 0.0000<BR id=uo8j1>3: 0.9999
-0.1561 0.9879<BR id=uo8j2>4: 0.9894 0.4091 0.9240<BR id=uo8j3>5: 0.4674
0.8874 0.9970<BR id=uo8j4>6: 0.3866 0.9297 0.9930<BR id=uo8j5>7: 0.7667
-0.9511 0.7124<BR id=uo8j6>8: 0.6945 0.9954 -0.7295<BR id=uo8j7>9: 0.3580
-0.9800 -0.9547<BR id=uo8j8>10: 1.0000 -0.9992 -0.0392<BR id=uo8j9>11: 0.9999
-0.3989 -0.9171<BR id=uo8j10>12: 0.9923 0.4082 -0.9213<BR id=uo8j11>13: 0.9989
0.9982 -0.0759<BR id=uo8j12>14: 0.2899 0.9919 -0.9655<BR id=uo8j13>15: 0.0000
0.0000 0.0000<BR><BR><BR>For high,<BR><BR> 0: 1.000, 0.000, 0.000<BR
id=fc0h2> 1: 0.000, 1.000, 0.000<BR id=fc0h3> 2: 0.000, 0.000,
1.000<BR id=fc0h4> 3: -0.042, -0.115, -0.993<BR id=fc0h5> 4: 0.175,
-0.200, -0.964<BR id=fc0h6> 5: 0.232, -0.163, -0.959<BR id=fc0h7> 6:
0.368, 0.026, -0.930<BR id=fc0h8> 7: 0.190, 0.374, -0.908<BR
id=fc0h9> 8: -0.117, 0.833, -0.540<BR id=fc0h10> 9: -0.200, 0.253,
-0.947<BR id=fc0h11> 10: -0.496, 0.134, -0.858<BR id=fc0h12> 11:
-0.014, -0.628, -0.778<BR id=fc0h13> 12: -0.744, -0.148, -0.651<BR
id=fc0h14> 13: -0.761, 0.320, -0.564<BR id=fc0h15> 14: -0.181,
0.925, -0.335<BR id=fc0h16> 15: -0.680, -0.422, -0.600<BR
id=fc0h17> 16: 0.777, 0.471, -0.418<BR id=fc0h18> 17: 0.924, -0.104,
-0.368<BR id=fc0h19> 18: 0.468, -0.767, -0.438<BR id=fc0h20> 19:
0.882, -0.189, -0.432<BR id=fc0h21> 20: 0.690, 0.706, -0.157<BR
id=fc0h22> 21: 0.239, 0.757, -0.608<BR id=fc0h23> 22: -0.058, 0.984,
0.170<BR id=fc0h24> 23: -0.537, 0.836, -0.113<BR id=fc0h25> 24:
-0.992, -0.121, -0.042<BR id=fc0h26> 25: -0.997, 0.071, -0.038<BR
id=fc0h27> 26: -0.872, 0.478, -0.101<BR id=fc0h28> 27: -0.249,
0.933, 0.258<BR id=fc0h29> 28: 0.118, 0.992, -0.047<BR
id=fc0h30> 29: 0.338, 0.841, 0.422<BR id=fc0h31> 30: 0.529, 0.841,
0.116<BR id=fc0h32> 31: 0.997, 0.055, -0.057<BR id=fc0h33> 32:
0.000, 0.000, 0.000<BR id=fc0h34><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
<o:p></o:p></SPAN></FONT></P></DIV></DIV></BLOCKQUOTE></BODY></HTML>
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