[Insight-users] B-Splines registration with fixed points

[Albert Gubern Mérida]

Hi Marius,

Thanks a lot. It seems to be what I exactly need. Anyway, is this
registration available to run using the binary elastix (what I have been
using at the moment)? If not, which components or/and testing files should I
use to implement it?

Thanks again, and sorry for my ignorance.

Albert

2011/7/25 <M.Staring at lumc.nl>

>  Hi Albert,****
>
> ** **
>
> If you have the coordinates of the sternum in both fixed and moving image
> you can add a term to the registration framework that penalizes deviation
> away from alignment of that point (or multiple points). We have done
> something similar:****
>
> ** **
>
> http://elastix.isi.uu.nl/marius/publications/2011_c_MICCAIb.html****
>
> ** **
>
> code of which can be found in elastix, which you can use freely.****
>
> ** **
>
> But it all depends on whether you have corresponding pointsets.****
>
> ** **
>
> Marius****
>
> ** **
>
> *From:* insight-users-bounces at itk.org [mailto:
> insight-users-bounces at itk.org] *On Behalf Of *Albert Gubern Mérida
> *Sent:* maandag 25 juli 2011 15:41
> *To:* insight-users at itk.org
> *Subject:* [Insight-users] B-Splines registration with fixed points****
>
> ** **
>
> Hi all,****
>
> ** **
>
> I am currently working in Breast MRI registration between different
> patients, especially interested in the alignment of body area (thorax +
> pectoral muscles). The first step of my registration consist of a
> translation to align the sternum, which gives a good initial alignment of
> the pectoral muscles. In the following link you can see an example of one
> slice with the sternum indicated with a white cross:
> http://imageshack.us/photo/my-images/220/breastmristernum.png/. After the
> translation step with the pectorals already "rigidly" aligned I apply
> non-rigid b-splines registration to the whole volumes. It works well in some
> cases, but in others, especially of course when the differences are high
> between fixed and moving images, the non-rigid registration move the sternum
> point and the pectorals are not aligned anymore. ****
>
> ** **
>
> I have thought that not allowing the non-registration the move of the
> sternum point and the ones close to it could be a good solution for such
> problem. However, I have taken a look to the classes and the mailing list
> but I have not found any direct/easy example to how to do that. ****
>
> ** **
>
> Could anyone give me some advice? Does a easy way to do it exist or I
> should modify the classes involved in the registration framework? Which ones
> should I take a look? ****
>
> ** **
>
> Thanks in advance,****
>
> ** **
>
> Albert****
>
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