[Insight-users] Bone removal

[Luis Ibanez]

Hi David,

If the vessels are close enough to the bone
as to share a pixel, there will not be much
that intensity-based methods could do.

Have you tried the use of Hessian-based methods
in order to identify the blood vessels ?

You may want to consider a bootstrap approach
in which you first do a conservative extraction of
blood vessels (no need to get them up to the border
that touches the bone).

Then mark such blood vessels as excluded pixels,
and perform a bone segmentation.

Then marks the bone pixels as excluded pixels and
do a second pass (more refined) for blood vessels.

You may find useful to look at the following
resources:

A)  InsightApplications/Curves3DExtractor
http://www.itk.org/ITK/applications/Curve3DExtraction.html

B)  InsightApplications/DuctExtractor

C) VMTK  ( http://www.vmtk.org/ )

D) Lesion Sizing Toolkit
     http://public.kitware.com/LesionSizingKit/index.php/Main_Page
     (It has several options for detecting
      blood vessels).



   Regards,


            Luis

--------------------------------------------------------------------
On Tue, Feb 16, 2010 at 3:16 PM, David Welch
<dmwelch at engineering.uiowa.edu> wrote:
> Hi all,
>
> I'm looking for a method to remove the bone from CTA data at the skull
> base.  I don't want to clean the image at all (GAD filtering, etc), if
> possible.  I am trying to reconstruct contrasted vessels near the bone and
> the partial volume effects are killing me!  Has anyone encountered this and
> found a reasonable solution?
>
> Thanks!
>
> --
> David Welch
> Graduate Student
> Dept. of Biomedical Engineering
> University of Iowa
> Lab: (319) 335-5279
>
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