[Insight-users] Is there a way to quantify accuracy of a deformable registration?

[John Drozd]

Hi Ganesh,

Thank you.
This description helps me a lot.

thanks,
John

On Wed, Apr 28, 2010 at 12:58 PM, Ganesh Narayanasamy <nganesh76 at hotmail.com
> wrote:

>
>
> One of the assumptions made in image registration is that the true
> deformation is known to us. However, this is not the case in real world
> problems. How would you quantify the accuracy of a registration when the
> true deformation is not known.
>
> In such a scenario, the widely used method for quantifying registration
> accuracy is by estimation of mean registration error (MRE) or true
> registration error. Pick a set of corresponding pairs of control points (or
> fiducial markers) on known structures or anatomy that can be seen on the
> original fixed and the moving images. The registration transformation
> applied to this set of fiducials in the fixed image volume gives the
> location of these reference fiducials in the moving image space. The mean
> Euclidean distance between these transformed fiducial points and their
> corresponding points selected earlier in the moving image volume gives the
> MRE.
> This method is dependent on your or the readers ability, skill and patience
> to pick the right points and hence prone to human error.
>
> Hope that helps,
> Ganesh
>
> ************************************************************************
> "What the mind of man can conceive and believe, It can achieve" - Napolean
> Hill
> -Ganesh Narayanasamy,Ph.D., PostDoc-University of Kentucky Cancer Center
> Earlier work:
> http://www.sciencedaily.com/releases/2007/05/070504133017.htm
> ************************************************************************
>
>
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