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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Jinsong,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>1) I usually use 2.5 x 2.5 x 2.5 mm for
1.5 T. About 60 DWI (with 12-orientation, 5 repeated NEX=1 (preferable) or
NEX=5) should give decent SNR, which should take about 7-8 min. With 3T, 30 DWI
should look good (3.5-4 min). <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For this protocol, 240x240 mm / 96x96 will
do.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>2) We also use 2.2 x 2.2 x 2.2 mm for 3T
with 60 DWI (8 min).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>3) Your protocol is 240/128 = 1.9 x 1.9. With
3 mm slice, this is about the same as 2.2x2.2x2.2. So, I think 12-orientation x
5 (60DWI) should provide decent SNR. However, because you are using longer echo
trains, you have longer echo time (= SNR loss), more distortion, and more blurring
(less true resolution due to T2* decay during the long echo). I prefer 96x96
with that reason.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>4) I prefer NEX = 1 x 5 repetition rather
than NEX = 5, but I believe recent Siemens scanners have an option for “no
average” even if you use NEX = 5 (all 5 NEX data are saved separately).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>5) I use shortest TR and your TR seems
right.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Susumu <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;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>jinsong tang<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 15, 2009
12:06 AM<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] re</span></font><font
size=2 face="MS Mincho"><span lang=JA style='font-size:10.0pt;font-family:"MS Mincho"'>：</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> MriView3D
application close</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Dear Susumu,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
This is my protocol of DTI and 3D scaning at SIEMENS 3T, Would you
please review it and give me some suggestions.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks,<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Jinsong<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=6 face="Times New Roman"><span
style='font-size:22.0pt;font-weight:bold'>DTI:<o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Axial<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>FOV= 240</span></font><font face=SimSun><span lang=JA style='font-family:
SimSun'>×</span></font>240mm<o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Slice thickness= 3mm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Slice number=45<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Gap=0mm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Matrix=128</span></font><font face=SimSun><span lang=JA
style='font-family:SimSun'>×</span></font>128<o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;background:lime'>NEX=5 or 1</span><o:p></o:p></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;background:lime'>TR=6046ms </span></font><font face=SimSun><span
lang=JA style='font-family:SimSun;background:lime'>？</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>TE=93 <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Diffusion directiuon =12<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>b=1000, b0=0.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><b><font size=5 face="Times New Roman"><span
style='font-size:18.0pt;font-weight:bold'>3D <o:p></o:p></span></font></b></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>TR= 2000ms<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>TE=2.6ms<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>FOV=240</span></font><font face=SimSun><span lang=JA style='font-family:
SimSun'>×</span></font>240mm<o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Slice thickness=1mm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Gap=0mm<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Slices=176<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Matrix=256</span></font><font face=SimSun><span lang=JA
style='font-family:SimSun'>×</span></font>256<o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Slice orientation= sagittal <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Flip angle=15º<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>NEX=1<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
<hr size=1 width="100%" align=center>
</span></font></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=2 face=SimSun><span
lang=JA style='font-size:10.0pt;font-family:SimSun;font-weight:bold'>发</span></font></b><b><font
size=2 face="MS Mincho"><span lang=JA style='font-size:10.0pt;font-family:"MS Mincho";
font-weight:bold'>件人：</span></font></b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'> susumu <susumu@mri.jhu.edu><br>
</span></font><b><font size=2 face="MS Mincho"><span lang=JA style='font-size:
10.0pt;font-family:"MS Mincho";font-weight:bold'>收件人：</span></font></b><font
size=2 face=Tahoma><span lang=JA style='font-size:10.0pt;font-family:Tahoma'> </span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>"DTI
Studio, ROI Editor, Landmarker Questions/Support"
<mristudio-users@mristudio.org><br>
</span></font><b><font size=2 face="MS Mincho"><span lang=JA style='font-size:
10.0pt;font-family:"MS Mincho";font-weight:bold'>已</span></font></b><b><font
size=2 face=SimSun><span lang=JA style='font-size:10.0pt;font-family:SimSun;
font-weight:bold'>发</span></font></b><b><font size=2 face="MS Mincho"><span
lang=JA style='font-size:10.0pt;font-family:"MS Mincho";font-weight:bold'>送：</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> 2009/4/9(</span></font><font
size=2 face="MS Mincho"><span lang=JA style='font-size:10.0pt;font-family:"MS Mincho"'>周四</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>), </span></font><font
size=2 face="MS Mincho"><span lang=JA style='font-size:10.0pt;font-family:"MS Mincho"'>下午</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>11:04:09<br>
</span></font><b><font size=2 face="MS Mincho"><span lang=JA style='font-size:
10.0pt;font-family:"MS Mincho";font-weight:bold'>主</span></font></b><b><font
size=2 face=SimSun><span lang=JA style='font-size:10.0pt;font-family:SimSun;
font-weight:bold'>题</span></font></b><b><font size=2 face="MS Mincho"><span
lang=JA style='font-size:10.0pt;font-family:"MS Mincho";font-weight:bold'>：</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Re:
[Mristudio-users] MriView3D application close</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Hi Hugh,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>When you got this error, please suspect
one of the following two reasons;</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>1) Memory shortage:</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Even if you have many GB of memories,
32-bit Windows system can allocate only 1 - 1.5 GB to each program. To check if
you have the memory problem, please restrict the slices to be calculated.
In the initial data parameter window, there is a section called
"Slices to be processed". Here you can specify only a portion of
slices to be processed. Please limit the slices to, for example, 0-9 and see
how it goes. If you can calculate tensors without errors, then you have the memory
problem. The solution is; a) upgrade to the 64-bit system or b) devide the
calculation to 2 batches (e.g. slice 0-29 for the first batch and 30-59 for the
second batch), calculate all maps (e.g. FA), and later combine them.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>2) Mismatch between the gradient table and
the number of images:</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>For example, if you specify 12-orientation
table and 30 volume images, then you get the error. After loading the data and
before you go to the Dti Map tab, make sure that you have 1 b0 + 64 DWIs in the
pull-down menu in the right column of the Image tab. If you have the correct
number of the images, then you might have an error in your gradient table.
Small mistakes such as missing "," are often difficult to detect. The
best way is; a) load the data using DtiMapping under the "File"
button on the top left, b) close the window, c) open the image paremater window
again by clicking "DtiMapping" in the "File" button again,
d) the window still remembers the gradient table you entered last time. This remembered
window tells how DtiStudio interpreted your gradient table. If there is any
syntax errors, you may find them much easier. For example, if you enter,
"4: 1 0.5 0", instead of "4: 1, 0.5, 0", then you would
find, "4: 1, 0, 0".</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>If any of these do not solve the issue,
please let us know.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:blue'>Susumu</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabIndex=-1>
</span></font></div>
<p class=MsoNormal style='margin-bottom:12.0pt'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;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>Hugh Wang<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, April 08, 2009
6:30 PM<br>
<b><span style='font-weight:bold'>To:</span></b> mristudio-users@mristudio.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Mristudio-users]
MriView3D application close</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi, <br>
<br>
I was using the dtistudio (ver. 2.4) to look at the Siemens DICOM
diffusion images (1baseline,64 gradients). After successfully loading the
images, I click the "dti map" option at lower right corner. Whatever
calculation I choose, it always gives me an error: <br>
<br>
"MriView3D MFC Application has encountered a problem and needs to
close. We are sorry for the inconvenience."<br>
<br>
I tried several PCs, and the problem keeped the same. I would appreciate that
if there's anyone having any idea on how to solve it. Thanks.<br>
<br clear=all>
Best,<br>
Hugh<o:p></o:p></span></font></p>
</div>
</div>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=1 width="100%" align=center>
</span></font></div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><a
href="http://cn.rd.yahoo.com/mail_cn/tagline/card/*http:/card.mail.cn.yahoo.com/"><font
face="MS Mincho"><span lang=JA style='font-family:"MS Mincho"'>好玩</span></font><font
face=SimSun><span lang=JA style='font-family:SimSun'>贺</span></font><font
face="MS Mincho"><span lang=JA style='font-family:"MS Mincho"'>卡等你</span></font><font
face=SimSun><span lang=JA style='font-family:SimSun'>发</span></font><font
face="MS Mincho"><span lang=JA style='font-family:"MS Mincho"'>，</span></font><font
face=SimSun><span lang=JA style='font-family:SimSun'>邮</span></font><font
face="MS Mincho"><span lang=JA style='font-family:"MS Mincho"'>箱</span></font><font
face=SimSun><span lang=JA style='font-family:SimSun'>贺</span></font><font
face="MS Mincho"><span lang=JA style='font-family:"MS Mincho"'>卡全新上</span></font><font
face=SimSun><span lang=JA style='font-family:SimSun'>线</span></font><font
face="MS Mincho"><span lang=JA style='font-family:"MS Mincho"'>！</span></font></a><o:p></o:p></span></font></p>
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