[Insight-users] CT range and Volume Rendering

[Luis Ibanez]

Hi Prabhat,

The range of Hounsfield Units values for most tissues are relatively 
stable. However, they will vary from patient to patient. For example,
the amount of body fat may affect the final intensities and noise
level of a CT image.

Here are typical values for some tissues

       http://www.vtk.org/Wiki/ITK_Hounsfield_Units


Note that ITK doesn't provide any visualization capabilities.

You may want to try VolumeRendering with VTK.

If you want to experiment with Predefined transfer functions you
may want to try the VolView

      http://www.kitware.com/products/volview.html

You may also want to try DeVIDE

     http://visualisation.tudelft.nl/Projects/DeVIDE

which is based on ITK and VTK.


    Regards,


       Luis



------------------
prabhat246 wrote:
> Hi..
> I tried to get maximum and minimum values in my  image data using
> MinimumMaximumImageCalculator. I keep pixel type Unsigned short int. 
> I get min = -3024 and max = 3072. 
> 
> Is it reasonable??? Does the intensity for bone and skin changes from
> Dataset to Dataset???
> Is there any inbuilt class to perform windowing for differnt thing e.g.
> bone, lungs etc??
> 
> 
> The other thing I want to know is in Volume rendering. How can I assign
> opacity to each pixel by checking its intensity value??