[vtkusers] curve plane reformat with a vtkThinPlateSplineTransform?

[Dean Inglis]

Im attempting to reslice a 3D image with a user generated curved plane to 
create
a panoramic dental x-ray from a CT head scan.
So far, I have a pipeline that allows the user to draw a contour with 
vtkContourWidget on an x-y slice
visualized with vtkImageActor.  I set up a vtkParametricSpline to smoothy 
fit N equi-spaced points
to the contour: call this the target.  There is a straight line composed of 
N equi-spaced points along
the x axis in the image plane: call this the source.  I then use 
vtkThinPlateSplineTransform
to transform the source to match the target.  I would like to use this 
transform information to
somehow vtkImageReslice through the 3D image to get a curvilinear plane 
reformat but I
have no idea how. One alternative option I can think of is to use 
vtkAppendPolyData and
generate a curved plane mesh by propogating the spline fit points from top 
to bottom of
the z-slices and then useing vtkProbeFilter to sample the CT scan, but this 
seems less
elegant.

Dean