[Mristudio-users] DTI mapping using nifti files

[Nida Sajjad]

Thanks a lot 
There is one problem when i tried to load my Raw files in dti mapping it shows error that number of files in this fold is less than expected
(image_slices*images_blocks)

how to deal with this?

Thanks a lot again

Date: Wed, 6 Mar 2013 10:29:22 -0500
From: susumu at mri.jhu.edu
To: mristudio-users at mristudio.org
Subject: Re: [Mristudio-users] DTI mapping using nifti files

Hi Nida,
We are still working on Nifty formats.You can try using the "Load" function of DtiStudio. There is an option to read Nifty.Once you successfully load the file, you can then save them in REC (raw) or Analyze.
However, at this moment, we can't guarantee the brain orientation, especially right and left. You have to confirm it by comparing with other programs.
DtiStudio/MriStudio assume data are directly from scanners to avoid any confusion about image orientation (radiology-neurology convention), matrix definition (right or left hand), coordinate definition (where is 0,0,0 in the matrix), XYZ definition, and oblique angle information. Once the data went through other programs, we can't keep track of all the potential definition differences. Then users need to mix different programs with own responsibility.

Susumu

On Wed, Mar 6, 2013 at 9:06 AM, Nida Sajjad <nidasajjad958 at hotmail.com> wrote:




Hi,

I have data set of DTI images of patients in the form of nifti files. I want to use DTI mapping in DTI studio to calculate FA and MD of specific ROI after creating them. Can you tell me best way to convert my data to be useable in DTI mapping.


Thanks,
Regards,
Nida

Date: Tue, 5 Mar 2013 21:56:36 -0500
From: deepa.krishnaswamy1 at gmail.com
To: mristudio-users at mristudio.org

Subject: [Mristudio-users] btable of Siemens Mosaic sample dataset

Hi, I believe that there are discrepancies with the sample Siemens Mosaic dataset. In the sample dataset, the gradient table is provided. The gradient table can of course also be read from the DICOM header. I performed the pipeline using both methods, and noticed that the results are different. I think that the b vectors are not the same, and also the bvalue suggested (700), is incorrect as a value of 800 is read from the DICOM header. 

Of course most people would obtain the btable from the header, so this is not a major issue, but I wanted to point it out in case someone uses the btable provided in the given text file.  Thanks, 


Deepa 


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