[vtkusers] Extract a curvilinear slice of volume

[Jérôme]

Hi,
You will find here:
   http://github.com/jeromevelut/Chiron
a plugin for ParaView that provides a medical imaging look&feel GUI.
Although this is not released, I put two algos that may interest you:
- vtkStraightenedCurvedPlanarReformation
- vtkStretchenedCurvedPlanarReformation

They take two inputs:
- an ImageData to reslice
- a polyline (vtkPolyData with polylines, such as the output of
vtkSplineFilter) that defines the successive slice plane orientation

The documentation is in progress, I hope it will be sufficient for you.

HTH
Jerome

2010/1/28 toulgen <toulgen at gmail.com>

>
> No idea to propose.
>
> Thank you for your help.
>
> -----Message d'origine-----
> De : toulgen [mailto:toulgen at gmail.com]
> Envoyé : mardi 26 janvier 2010 17:53
> À : 'Bill Lorensen'; 'David Gobbi'
> Cc : 'vtkusers at vtk.org'
> Objet : RE: [vtkusers] Extract a curvilinear slice of volume
>
>
> Hi-vtkusers,
>
> After some trial weeks I am always blocked.
> I tried to extract the curvilinear plan with using the vtkPlanes class but
> that does not give good result.
>
> David/Bill can you give me more details concerning your suggestion.
> Have you an example?
>
> Thank you very much
>
> ToulGen
>
>
> -----Message d'origine-----
> De : Bill Lorensen [mailto:bill.lorensen at gmail.com]
> Envoyé : mercredi 16 décembre 2009 18:59
> À : David Gobbi
> Cc : toulgen; vtkusers at vtk.org
> Objet : Re: [vtkusers] Extract a curvilinear slice of volume
>
> I have used 2) many times. Try it, you'll like it.
>
> Bill
>
> On Wed, Dec 16, 2009 at 12:15 PM, David Gobbi <david.gobbi at gmail.com>
> wrote:
> > It's not an easy thing to do.  Here's are possible methods:
> >
> >
> > 1) If you want the result to be an "image", then do the following:
> >
> > Create a grid (i.e. a vtkImageData) of scalar type "float" and 3
> > scalar components.  Set the extent, origin, and position to be the
> > same as that of the slice that you want to display.
> >
> > Populate the grid with vectors that go from the voxel positions in
> > your slice (i.e. flat space) to the corresponding voxel position that
> > you want to interpolate from in the original image (i.e. the position
> > along your curved surface).
> >
> > You can use this grid to make a vtkGridTransform, and you can use the
> > GridTransform in the SetTransform() method of vtkImageReslice.
> >
> >
> > 2) If you don't care what the data type of the output will be, you can
> > make a colored polydata surface as follows:
> >
> > Create a polydata surface mesh i.e. create the geometry of the surface
> > that you wish to extract.  Use very small polygons, i.e. the polygons
> > should be about the same size as your pixels.
> >
> > Use vtkProbeFilter to probe your volume and set the scalars of the
> > surface mesh.  Before doing this, you should convert the image to RGB
> > with vtkImageMapToColors.
> >
> >
> > Good luck, I've never tried these methods myself but there is no
> > reason why they shouldn't work.
> >
> >    David
> >
> >
> > On Wed, Dec 16, 2009 at 9:01 AM, toulgen <toulgen at gmail.com> wrote:
> >>
> >> Hi vtk-users,
> >>
> >> To extract the axial, the coronal and the sagittal slice I use the
> >> vtkImageReslice class.
> >>
> >> I want to extract a curvilinear slice of volume?
> >>
> >> What is class I can use?
> >>
> >> Thx
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