[Insight-users] question regarding registration outputs

[Matt McCormick]

Hi Tim,

No, the WarpImageFilter should be generating a 'pre-deformation'
look-alike.  For more information, see the Software Guide.

HTH,
Matt

On Wed, Oct 9, 2013 at 4:48 PM, Tim Bhatnagar <tim.bhatnagar at gmail.com> wrote:
> Hello all,
>
> I use the ITK examples ImageRegistration5, ImageRegistration8 and
> DeformableRegistration2 (Demon's) for registration of normal and deformed
> data (same subject). Briefly, I do some pre-registration of my data using
> ImageReg5 and ImageReg8 (for gross alignment), after which I take the
> produced displacement fields, and use them as the 'initial displacement
> field' for DefReg2.
>
> In all cases, I am using my 'pre-deformation' data as my fixed source, and
> my 'deformation' data as my moving source.
>
> I have some fiducial markers to check the accuracy of the generated
> displacement field, and it looks pretty good. However, when trying to
> produce figures, my registration output looks much closer to my
> 'deformation' data, and sometimes the output and the actual 'deformation'
> data are offset by a magnitude.
>
> In my situation, should I be aiming to have my registration output appear
> similar to my 'pre-deformation' data? (I get confused reading the ITK
> explanation on that) Shouldn't I be able to produce the a 'deformation'
> look-a-like by using WarpImageFilter with my 'pre-deformation' data and my
> generated displacement field?
>
> Sorry this was so wordy. Any help would be much appreciated.
>
> --
> Tim Bhatnagar
> PhD Candidate
> Orthopaedic Injury Biomechanics Group
> Department of Mechanical Engineering
> University of British Columbia
>
> Rm 5000 - 818 West 10th Ave.
> Vancouver, BC
> Canada
> V5Z 1M9
>
> Ph: (604) 675-8845
> Fax: (604) 675-8820
> Web: oibg.mech.ubc.ca
>
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