[IGSTK-Users] Visualizing CT Image

[Patrick Cheng]

Hi Chris,

You need to connect the View and ImageSpatialObject in a scene graph 
tree, so the View knows where the image is.

http://public.kitware.com/IGSTKWIKI/index.php/Needle_Biopsy#How_to_connect_the_scene_graph

Please take a look at the above example.

Patrick

Chris Heath wrote:
> Hello all,
> 
> I am having trouble visualizing a CT Image and I am not sure what I'm 
> doing wrong:
> 
> First I add an observer to my CT Image Reader Object:
>        
> m_ImageReader->AddObserver(igstk::CTImageReader::ImageModifiedEvent(),m_CTImageObserver); 
> 
> 
> Then, I read the CT Image:
>        m_ImageReader->RequestSetDirectory( directoryName );
>        m_ImageReader->RequestReadImage();
>        m_ImageReader->RequestGetImage();
> 
> Then, I create my spatial object and attach it to my spatial object 
> representation:
>        m_CTImageSpatialObject = m_CTImageObserver->GetCTImage();
>        
> m_CTImageSpatialObjectRepresentation->RequestSetImageSpatialObject( 
> m_ImageSpatialObject );
> 
> Then I add my igst2DView object to my fltk widget (Fl_box)
>        this->DisplayCTWidget->RequestSetView( ctView );
> 
> Then I add my image representation to my view
>        ctView->RequestRemoveObject( m_CTImageSpatialObjectRepresentation );
>        ctView->RequestAddObject( m_CTImageSpatialObjectRepresentation );
> 
> Finally, I set my slice number using the get slice bounds method from 
> "FourViewsTrackingWithCT.cxx"
>        m_CTImageSpatialObjectRepresentation->RequestSetSliceNumber( 
> slice );
> 
> My log contains no errors, my CT image is being succesfully read (I can 
> view patient name, and my slider sets the correct bounds on the number 
> of slices) but I don't see any image.  What am I missing?  Any help 
> would be appreciated.
> 
> Thanks,
> Chris Heath
> 
> 
> 
> Christopher C. Heath
> Vanderbilt University School of Engineering
> christopher.c.heath at vanderbilt.edu
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