[Insight-users] Is there a way to use itk::DiffusionTensor3DReconstructionImageFilter without calling SetReferenceImage() first?

[Karthik Krishnan]

John,

You need to set the reference image at some point, before running the
filter. If you are referring to the order in which you call
  filter->AddGradientImage( dirVector_i, image_i );
  filter->SetReferenceImage( refImage );
no that does not matter, but you need to have a reference image to run the
filter.

The Stejskal-Tanner equations relate diffusion weighted measurements to
measurements taken in the absense of diffusion sensitiszing gradients. The
filter is a straight implementation of equation (3) in
splweb.bwh.harvard.edu:8000/pages/papers/westin/ISMRM2002.pdf

So if you don't have any of the parameters in (3), you will not be able to
reconstruct "D".

--
karthik


On 3/14/07, johnjtchen at aol.co.uk <johnjtchen at aol.co.uk> wrote:
>
> Dear All,
>
> I have 6 gradient images but I don't have the b0 image. So is there a way
> to
> use itk::DiffusionTensor3DReconstructionImageFilter without calling
> SetReferenceImage() first?
>
>
> Many thanks.
>
> John
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