[Mristudio-users] File Type Question

[susumu mori]

Hi Armen,

That means, the gradient table and the file size didn't match.
When you converted the analyze to raw, I assume that you saved all images in
one file. Then, your file size should be;

192x192 (I assume that your in-plane resolution is 192x192) x 6 x (30+1 b0)
x 2 (integer).

Then your gradient table should have 31 (30 dwi +1 b0) lines.

Ignore the error message and load the data. See if the dimension of your
images are correct. Look at the pull-down menu to see you really have 31
images loaded.

Close the window and choose "DtiMapping" again. In the opening window, it
still remembers the gradient table you specified in the previous session.
Inspect the table and make sure that you have 31 lines.

Susumu

On Tue, Oct 13, 2009 at 1:30 PM, Armen Gharibans <ghariba1 at illinois.edu>wrote:

> I have Analyze data file that I can open and view in MRI View3D.  It
> is 6 slices and 30 different directions in one analyze file and a
> separate header file.  When I try to do DTI Mapping, it doesn't give
> the option for Analyze data, so I used MRI View3D to convert the
> Analyze data to Raw Data and also NRRD, and I get errors with both.
> My gradient table should be correct.
>
> When I try to use the raw data, which is just one .dat file, I get the
> message, "Number of files in this fold is less than expected."  I am
> guessing that is because the raw data should be a bunch of .bin
> files.  Why did it save it in one .dat file?
>
> Thank you.
> Armen Gharibans
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