[vtkusers] Create an approximate cross-section of a RT ROI

[Lars Friedrich Lars]

Scott,

I had a similar problem with 'free planes' at the beginning, but I usually define the cut plane 'a bit' (0.001 mm or so) in front of the image slice (towards view position).

regards,

lars

-------- Original-Nachricht --------
> Datum: Tue, 4 May 2010 09:12:33 -0500
> Von: "Scott Johnson" <Scott.Johnson at neuwave.com>
> An: "Xiaofeng Z" <xf10036 at hotmail.com>, "VTK" <vtkusers at vtk.org>
> Betreff: Re: [vtkusers] Create an approximate cross-section of a RT ROI

> Hello Xiaofeng,
> 
>  
> 
> I've been working on something similar, but am not quite there yet.  I
> can get you started.
> 
>  
> 
> The general idea is that you will need to create a polygonal shape from
> the contours in the RT structure set, then create a vtkPlane which
> represents the plane you wish to cut.  You can then create a pipeline
> which looks something like:
> 
>  
> 
> vtkCutter -> vtkPolyDataMapper -> vtkActor
> 
>  
> 
> Set the properties of the actor to have EdgeVisibilityOn and an
> EdgeColor or the cut shape will not be visible.  The actor will show a
> cross section of the ROI intersected with the plane.
> 
>  
> 
> The issue I'm having is properly displaying the vtkActor with the
> images.  I've extended beyond axial sagittal and coronal and I seem to
> be missing something in the coordinate conversions.
> 
>  
> 
> Good luck.
> 
>  
> 
>                                 -- Scott
> 
>  
> 
> From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On
> Behalf Of Xiaofeng Z
> Sent: Monday, May 03, 2010 7:12 PM
> To: VTK
> Subject: [vtkusers] Create an approximate cross-section of a RT ROI
> 
>  
> 
> Hi vtkUsers,
> 
> I have a set of contours in axial orientation representing a ROI.  I
> need to sketch the ROI in coronal and sagittal plane, by connection the
> points made from the intersection of the contours and the cutting plane.
> Is there a function to do that in vtk or in ITK?
> 
> I know the result is not "precise" in a sense that the contours make
> this way is not always consistent between themselves.  But it seemed to
> be the only viable way to sketch a ROI in a multi-planar rendering in
> real time.
> 
> Many thanks!
> Xiaofeng
> 
> 
> 
> 
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