[Insight-users] Interpolation Volume

[Gupt]

Hello Luis,

Thanks for the reply. In continuation to my previous question... So using
the stack of 2d MRI slices, I've a certain segmentation on each of the
slices and using the segmented output I've built a surface model and now
I've incorporated the intensities of the slices in the surface model. Now,
I'm interested to find the volume of the segmented region. So, using the
segmented outputs from the various slices, I want to reconstruct a volume,
compute and finally visualize the volume. Can you give me a start on how I
can proceed? Is it possible to build a 3d volume (not surface model) from a
stack of 2d slices (only one axial view not 3 views)? Are there any standard
algorithms being used for construction of 3d volumes from 2d slices?

Appreciate your help in this matter.

Regards,
Gupt


Luis Ibanez wrote:
> 
> Hi  Gupt,
> 
> 
> Yes, just do the following:
> 
> 
> A) Load the 2D slices into a single 3D image using the
>      itk::ImageSeriesReader,
> 
> 
> B) Connect the image an ImageInterpolator
>      The typical choice is the itkLinearImageInterpolateFunction class,
>      (but you can also use NearestNeighbors, BSpline and
>       WindowedSinc, it is a trade-off between computation time and
>       interpolation precision)
> 
> 
> C) Take all the points from your surface model and for every
>      point call the method:
> 
>        PixelType  pixelValue =    Interpolator->Evaluate( point )
> 
>     and then assign that pixel value to the corresponding point
>     in the surface model.
> 
> 
> 
>   Please let us know if you run into any problem.
> 
> 
>        Thanks
> 
> 
>           Luis
> 
> 
> ------------------------------------------------------------------
> On Wed, Dec 2, 2009 at 2:35 PM, Gupt <adityargupta at gmail.com> wrote:
>>
>> I've a stack of 2d cardiac mri images in single view. I've written the
>> code
>> to do a surface reconstruction of the left ventricle wall of the heart
>> (looks like a hollow cylinder). Is there a method/ function to
>> incorporate
>> the intensity information (in the 2d slices) in to the model, like some
>> kind
>> of interpolation to obtain intensity between the slices? Thanks for the
>> help.
>> --
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>>
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