[Insight-users] Documentation for Hessian3DToVesselnessMeasureImageFilter

[Karthik Krishnan]

Anja:

Thanks for pointing this out, I just fixed the documentation.

  itkHessian3DToVesselnessMeasureImageFilter.h -> new revision: 1.10

To clarify, bright tubular structures in a dark background will have two
eigen values that are very negative and one that is close to zero. Regarding
parameter settings, the alpha_1 and 2 values are explained in the reference
that's listed on the doxygen doc.


Thanks
--
karthik



On Mon, Jul 12, 2010 at 9:07 PM, Anja Ende <anja.ende at googlemail.com> wrote:

> Hello everyone,
>
> I am trying to use the Hessian3DToVesselnessMeasureImageFilter to
> extract possible vessels from an MRA image. However, I am a bit
> confused as to the parameters to use for the filter. So, the
> documentation says:
>
> "The filter takes as input an image of hessian pixels and preserves
> pixels that have eigen values lambda_3 close to 0 and lambda_2 and
> lambda_1 as large negative values. (for bright tubular structures).
>
> However, later it goes on to say that:
>
> "Bright tubular structures will have low lambda_1  and large negative
> values of lambda_2 and lambda_3."
>
> I am not sure which one is correct.
>
> Does someone know which range of alpha_1 and alpha_2 should I try
> playing with when looking at MRA images where the vessels appear as
> bright structures?
>
>  Cheers,
>
> Anja
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