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So I have used Elastix (extention of ITK: http://elastix.isi.uu.nl/) to do a transformation on dicom images and have done this succesfully
I have segmented a vessel in these images as well and want to apply the same transformation. Is there a way to concert the vtk file to a itk supported format within Python? Or is there a way to apply the same transformation? Elastix works a bit different then itk, but I have an ouput file with the data