[Insight-users] DiffusionTensor3DReconstructionFilter

[Karthik Krishnan]

Alba:

Also take a look at the examples and tests I placed in the repository:

   Examples/Filtering/DiffusionTensor3DReconstructionImageFilter.cxx

Testing/Code/BasicFilters/itkDiffusionTensor3DReconstructionImageFilterTest.cxx

and the NRRD IO part :
   Testing/Code/IO/itkNrrdDiffusionTensor3DImageReadWriteTest.cxx
   Testing/Code/IO/itkNrrdDiffusionTensor3DImageReadTest.cxx

As the example mentions:

// The easiest way to get started is to try out the filter on a sample
dataset.
//
// Acquiring sample datasets:
//  1. Get the DWI datasets from
//        ftp://public.kitware.com/pub/namic/DTI/Data/dwi.nhdr
//        ftp://public.kitware.com/pub/namic/DTI/Data/dwi.img.gz (gunzip
this)
//     These datasets contain a reference T1 image and 30 diffusion weighted
//     images. See the nrrd header for details such as B value etc..
//
//  2. Run the example with the following args
//       dwi.nhdr 80 Tensors.mhd FractionalAnisotropy.mhd
RelativeAnisotropy.mhd 1
//
//  3. You should find 30 gradient images, 1 reference image, the FA and RA
images
//     in your working directory, which you can fire up in your favourite
volume
//     browser.

Hope this helps
--
karthik


On Wed, Feb 16, 2011 at 11:57 PM, Magnotta, Vincent A <
vincent-magnotta at uiowa.edu> wrote:

>   Here is a link to a program that we write that uses the filter. We use
> NRRD files as input to this program.
>
>
> http://www.nitrc.org/plugins/scmsvn/viewcvs.php/GTRACT/Cmdline/gtractTensor.cxx?root=vmagnotta&view=markup
>
>  Vince
>
>   --
> Associate Professor
> Department of Radiology
> 0453-D JCP
> 200 Hawkins Drive
> Iowa City, IA 52242
> E-mail: vincent-magnotta at uiowa.edu
> Phone: 319-356-8255 Fax: 319-353-6275
> Website: http://www.healthcare.uiowa.edu/Radiology
>
>   From: alba garin <albagarin1986 at hotmail.com>
> Date: Wed, 16 Feb 2011 08:15:47 +0000
> To: <insight-users at itk.org>
> Subject: [Insight-users] DiffusionTensor3DReconstructionFilter
>
>  Hi everyone,
>
>  im getting mad trying to use the DiffusionTensor3DReconstructionFilter
> with a nrrd diffusion file. I store properly the gradients and after using
> the filter I get a image with pixels of DiffusionTensor3D. the problem is
> that this image has as voxels only zeros...
> anyone can help me, please?
>
>  Thanks,
> Alba
>
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