[Camino-users] the problem with dt2nii

[Philip A Cook]

1 is the fourth dimension, which according to the NIFTI standard is reserved for time. 

BTW, if you have the latest Camino, you can read and write nifti more directly:

  dtfit 4Ddwi_b1000.nii.gz 4Ddwi_b1000_bvector.scheme -bgmask brain_mask.nii.gz | dt2nii -outputroot nifti_ -header 4Ddwi_b1000.nii.gz



> On Mar 27, 2016, at 9:30 PM, mirabelle <j.y.mirabelle at gmail.com> wrote:
> 
> Dear Camino experts，
> 
>     I entered the following command:
> 
>    
>     fsl2scheme -bvecfile bvecs -bvalfile bvals -bscale 1 > A.scheme2
> 
>     image2voxel -4dimage 4Ddwi_b1000.nii.gz -outputfile dwi.Bfloat
> 
>     dtfit dwi.Bfloat 4Ddwi_b1000_bvector.scheme -bgmask brain_mask.nii.gz -outputfile dt.Bdouble
> 
>     dt2nii -inputfile dt.Bdouble -outputroot nifti_ -header 4Ddwi_b1000.nii.gz
> 
>              
>    This produces nifti_dt.nii.gz, nifti_lnS0.nii.gz, and nifti_exit.nii.gz. The Tutorials tell me that the nifti_dt.nii.gz is a 5-dimensional image with six components .
>  
>    Read it use command: niftiheader -readheader nifti_dt.nii.gz
>    The dimension of the image is 91 109 91 1 6
>    I know that 91 109 91 is the size of the image. 6 indicate the six components of DT.
>    What do '1' represent?
>   I would be grateful if you could give some suggestions.
> 
>   I’m looking forward to your response. Feel free to contact me anytime.
> 
> Sincerely,
> mirabelle
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