[vtkusers] How to resample RT Dose Grid pixel data with respect to a CT image?

[abhishek]

Dear Users,

I want to draw ISODOSE contours on a CT Image. To generate ISODOSE contours,
I am using vtkContourFilter class. 
I am using RT DOSE Grid's pixel data to create vtkImageData and giving the
resulting vtkImage as input to vtkContourFilter. 

My problem is that, the RT DOSE Grid's and CT image's pixel spacing and 
image patient position(IPP) are different. This result's in generation of
wrong contour points.

For reference IPP and Pixel spacing for CT and RT DOSE grid are:
CT:    [-329.6, -319, -241.3], [1.2461, 1.2461]
Dose: [-185.1, -180, -546.3], [2.5, 2.5]

I have two questions here:
1. I am certainly sure that I will have to some how resample dose's pixel
data to map on to CT image. How can I do this? 

2. Will vtkImageResample class be useful? If yes, then how can I use this
class. If no, then what other options do I have?

Regards
Abhishek. 



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