ANTS registration/nipype: perform only linear transformation

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Hi,

I am trying to use nipype’s ANTS interface for registration. I want to perform linear transformation only on a set of subjects using the following terminal command:

ANTS 3 -m MI[movingimage,referenceimage,1,2] -i 0 --rigid-affine true -o outputname

By setting the “–rigid-affine” to be true, ANTS won’t perform non-linear warp and only outputs outAffine.txt. However, I do not see this option in nipype’s ANTS interface. When I tried to set “-i” (number of non-linear iterations) to be 0, it reported errors.

Does anyone know how to set “–rigid-affine” to be true or how to perform linear transformation only using nipype’s ANTS interface? Any insights would be much appreciated!

Many thanks,
Yizi

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If something is missing in any given nipype interface you can always pass arbitrary command line arguments via args. For example:

interface.inputs.args = '-i 0 --rigid-affine true'