[vtkusers] Volume Rendering of 3D CT Scan similar to 2D X Ray image

[Bill Lorensen]

Arnaud,
I have my old code working. I will send you a copy tomorrow.
On Jan 28, 2014 8:11 AM, "Arnaud Gelas" <arnaudgelas at gmail.com> wrote:

> Hi Bill,
>
> I have been playing with existing ITK examples, but results are not good
> enough for my case...
>
> Would you mind sharing the code, please?
>
> Thanks!!
>
> Cheers,
> Arnaud
>
> On Jan 24, 2014, at 4:33 PM, Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
>
> > I have some code we wrote years ago. It used
> > typedef itk::ExpNegativeImageFilter<InputImageType,InternalImageType>
> >      ExpNegativeType;
> >    ExpNegativeType::Pointer expNegative = ExpNegativeType::New();
> >    expNegative->SetInput( thresh->GetOutput());
> >    expNegative->SetFactor( -.0011 );
> >
> > followed by
> >   // grab a row for the 'DRR'
> >    typedef
> itk::AccumulateImageFilter<InternalImageType,InternalImageType>
> > AccumulateType;
> >    AccumulateType::Pointer APAccumulate = AccumulateType::New();
> >    AccumulateType::Pointer lateralAccumulate = AccumulateType::New();
> >
> >    APAccumulate->SetAverage(false);
> >    lateralAccumulate->SetAverage(false);
> >    APAccumulate->SetAccumulateDimension(1);
> >    lateralAccumulate->SetAccumulateDimension(0);
> >
> >    APAccumulate->SetInput ( expNegative->GetOutput() );
> >    lateralAccumulate->SetInput ( expNegative->GetOutput() );
> >    APAccumulate->Update();
> >    lateralAccumulate->Update();
> >
> > I'll be happy to share the code with the caveat that it has lots of
> > application specific code in it.
> >
> > There is also the ITK Example:
> > Examples/Filtering/DigitallyReconstructedRadiograph1.cxx
> >
> > Bill
> >
> > On Fri, Jan 24, 2014 at 10:23 AM, Arnaud Gelas <arnaudgelas at gmail.com>
> wrote:
> >> Hi all,
> >>
> >> I would like to render as realistic as possible 1 3D CT Scan, as if it
> was 2D X Ray Image.
> >>
> >> I have tried Average Intensity Projection, but results are much
> smoother than what it should look like.
> >>
> >> Has anyone any experience on the question? Any advice appreciated?
> >>
> >> Do I need to generate a specific transfer function for this CT? Could I
> apply the same transfer function to another one?
> >> Has anyone got such a transfer function that could be shared?
> >>
> >> Thanks in advance,
> >>
> >> Best regards
> >> Arnaud Gelas
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> >
> > --
> > Unpaid intern in BillsBasement at noware dot com
>
>
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