[Mristudio-users] re： MriView3D application close

[jinsong tang]

Dear Susumu,

This is my protocol of DTI  and 3D scaning at SIEMENS 3T,  Would you please review it and give me some suggestions.

Thanks,

Jinsong

DTI:
Axial
FOV= 240×240mm
Slice thickness= 3mm
Slice number=45
Gap=0mm
Matrix=128×128
NEX=5  or  1
TR=6046ms  ？
TE=93 
Diffusion directiuon =12
b=1000, b0=0.

3D 
TR= 2000ms
TE=2.6ms
FOV=240×240mm
Slice thickness=1mm
Gap=0mm
Slices=176
Matrix=256×256
Slice orientation= sagittal 
Flip angle=15º
NEX=1



________________________________
发件人： susumu <susumu at mri.jhu.edu>
收件人： "DTI Studio, ROI Editor, Landmarker Questions/Support" <mristudio-users at mristudio.org>
已发送： 2009/4/9(周四), 下午11:04:09
主题： Re: [Mristudio-users] MriView3D application close


Hi Hugh,
 
When you got this error, please suspect one of the following two reasons;
 
1) Memory shortage:
 
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.
 
2) Mismatch between the gradient table and the number of images:
 
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".
 
If any of these do not solve the issue, please let us know.
 
Susumu


________________________________
From: mristudio-users-bounces at mristudio.org [mailto:mristudio-users-bounces at mristudio.org] On Behalf Of Hugh Wang
Sent: Wednesday, April 08, 2009 6:30 PM
To: mristudio-users at mristudio.org
Subject: [Mristudio-users] MriView3D application close

Hi, 

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: 

"MriView3D MFC Application has encountered a problem and needs to close.  We are sorry for the inconvenience."

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.

Best,
Hugh



      ___________________________________________________________ 
  好玩贺卡等你发，邮箱贺卡全新上线！ 
http://card.mail.cn.yahoo.com/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mristudio.org/pipermail/mristudio-users/attachments/20090415/f68c0309/attachment.html