[Insight-users] Concatenation of deformation fields?

[Luis Ibanez]

Hi Gerald,

It should be possible to separate the non rigid component
from the final deformation field.

Did you compute both the

1) D_r^1      and
2) D_n^1

in the same image grid ?

Note however that the key point here is a problem of
reference systems.  The non-ridig deformation field
will be one with respect to the rotated image, not
with respect to the original image.


      Luis


--------------------------------------------------------------------------------------
On Wed, Mar 10, 2010 at 11:52 AM, Lodron, Gerald
<Gerald.Lodron at joanneum.at> wrote:
>
> Hi,
>
> I have a quite interresting problem and I am not sure if it is solveable but maybe someone can help:
>
> I made a rigid registration and converted the output to a deformation field, let us name it D_r^-1 (it is the inverse deformation because of inverse mapping). After that i made a nonrigid registration with the R_rigid^-1 as start deformation value, the output is the inverse deformation field of the rigid and the nonrigid registration, let us call it D_r,n^-1.
>
>  My question is, is it possible to calculate the pure nonrigid deformation field D_n^-1 ?
>
> Best regards
>
>
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