[Insight-users] Inverse of B-Spline deformation field

[Jonathan Lo]

Hi all,

I am currently looking for method to find a reasonable inverse of a B-Spline
deformation field.  I have searched the past mailing list, and found a
proposed method by using the IterativeInverseDeformationField filter.  

However, I would like to represent the deformation using the
BSplineDeformableTransform.  So I am thinking of using the
IterativeInverseDeformationField of a regular grid and then use it to get
the B-Spline deformation.  Here are a couple of questions:

1) Is this a good way to do it?  Has anyone done this before?  Or are there
other ways to get a reasonable inverse of B-Spline deformation field?

2) I have found another filter called InverseDeformationField, what is the
difference between this and IterativeInverseDeformationField?

Thank you very much in advance!

Best,
Jonathan

-----------------------------------------
Jonathan Lok-Chuen Lo
Wolfson Medical Vision Laboratory
Information Engineering Building
Oxford University, Oxford, OX1 3PJ
Tel: +44 (0)1865 283069