[Mristudio-users] MriView3D application close

[Hugh Wang]

Thank you very much, Dr. Mori

Now I'm sure that the problem lies in the gradient table and the number of
images.

the original files are dicom files, which is 96*96 in size and 1662 slices.
bvecs and bvals text files are within the folder when I got the images.

After I loaded the image into dtistudio, the pull down menu in the right
column of the image tab only showed one DWI (see attachment)

Do I need to extract the bvec information from dicom files instead of using
the existed one?

Best,
Hugh


On Thu, Apr 9, 2009 at 11:04 AM, susumu <susumu at mri.jhu.edu> wrote:

>  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
>
> _______________________________________________
> Mristudio-users mailing list
> Mristudio-users at mristudio.org
> http://lists.mristudio.org/mailman/listinfo/mristudio-users
>
>
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