[vtkusers] vtkDICOMImageReader volume rendering problem

[Dominik Szczerba]

SetDataTypeToUnsignedShort?
Sounds like you need to convert your data to the supported type (no idea 
how DICOM stores data)
--dsz

Peter wrote:
> hi my friends,
> 
> when i am trying to do some volume rendering using
> vtkDICOMImageReader, it shows some error likes this.
> 
> ERROR: In C:\VTK4.4\Rendering\vtkVolumeRayCastMapper.cxx, line 325
> vtkOpenGLVolumeRayCastMapper (026A2BB0): Cannot volume render data of
> type short, only unsigned char or unsigned short.
> 
> 
> my code is roughly like:
> 
> =======
> 
> vtkDICOMImageReader reader
>       reader SetDataByteOrderToLittleEndian;
>       reader SetDirectoryName "C:\\dicom"
>       [reader GetOutput] ReleaseDataFlagOn
>       reader SetDataSpacing 0.938 0.938 1.3
>       reader Update
> 
> vtkPiecewiseFunction volOpacityTransferFunctiono
> ...
> ...
> 
> vtkColorTransferFunction colorTransferFunction
> ....
> ....
> 
> vtkVolumeProperty vol_prop
> vol_prop SetColor colorTransferFunction
> vol_prop SetScalarOpacity volOpacityTransferFunction
> vol_prop SetInterpolationTypeToLinear
> vol_prop ShadeOn
> 
> vtkVolumeRayCastCompositeFunction comp_func
> 
> vtkVolumeRayCastMapper  volmap
> volmap SetInput [reader GetOutput]
> volmap SetVolumeRayCastFunction comp_func
> 
> volmap SetSampleDistance 1.0
> 
> vtkVolume vol
> vol SetProperty vol_prop
> vol SetMapper volmap
> ren1 AddVolume vol
> 
> ===============
> 
> 
> can anyone out there help me out for how to use vtkDICOMImageReader to
> do some volume rendering. it seems fine when using vtkVolume16Reader.
> 
> 
> Thank you very much
> 
> Yours
> 
> Peter Pan
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-- 
Dominik Szczerba, Dr.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi