Finite Element Analysis

[Adrian Anner]

Hi Travis

I'm doing something similar at the moment. Do you have the book 'The
Visualization Toolkit' (2nd Edition), on page 513ff Kap. 13.2 is described
how you can constract a 3D model.
I'm just using the following pipeline:

vtkVolume16Reader->vtkImageThreshold->vtkImageGaussianSmooth->vtkMarchingCub
es->vtkDecimate->
vtkSmootherPolyDataFilter->vtkPolyDataConnectivityFilter->vtkSTLWriter

may be you have to implement some drawing functions to correct the ct-slices
after the Threshold-Filter.

hope this helps

Adrian

----- Original Message -----
From: <vtk at yifan.net>
To: <vtkusers at gsao.med.ge.com>
Sent: Wednesday, December 08, 1999 11:26 PM
Subject: Finite Element Analysis


> Hi:
>
> I am a newbie of VTK and FEM, but right now I have to build
> a program which can read CT slices (DICOM file), and construct
> a 3D model (in VTK) of the bone, then export this 3D model to
> a Finite Element Analysis program (e.g. ANSYS).
>
> I use DICOM2 to convert dicom file to raw format, and then
> I use vtkVolume16Reader reads the raw data, and then
> use vtkMarchingCubes to construct the 3D model.
>
> my question are:
>
> 1: VTK can export STL files, but ANSYS can not import STL files,
> so if there is a tool can convert STL file to IGES or other
> formats?  or if there is a better way to do this?
>
> 2: As I mentioned before, I am not familiar with finite element
> analysis programs, so if I use vtkMarchingCubes to construct
> the 3D model, (assuming I can export this 3D model to finite
> element progran, e.g. ANSYS), if the finite element program
> can regard this 3D model as a "good" model?
>
> 3: so far the result 3D model is not good, cause the original
> CT slices are not very clear, especially at the bone connection
> area.  so, how can I "clean" the original slices? any graphic
> libraries available?
>
> Thank's a looooot!
>
> -Travis
>
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