why not just invertthe matrix? The inverse is
1.0022 0.0071 -0.0177 0.0528
-0.0146 0.9990 0.0027 -1.5519
0.0129 0.0094 1.0027 -1.2012
0 0 0 1.0000
On 11/12/2013 09:59 AM, Anita van Loenhoud wrote:
> Dear FreeSurfers,
>
> I have a question regarding conversion from MNI152 coordinates to
> MNI305 coordinates. I want to take ROIs from a VBM study and use these
> exact same ROIs in my vertexwise analysis. So I need to translate the
> x, y, z coordinates from MNI152 space into MNI305 space. In previous
> posts, I found a matrix that converts from MNI305 coordinates to MNI152:
>
> M = [ 0.9975 -0.0073 0.0176 -0.0429
> 0.0146 1.0009 -0.0024 1.5496
> -0.0130 -0.0093 0.9971 1.1840
> 0 0 0 1.0000]
> P305 = [MNI305x MNI305y MNI305z 1]';
> P152 = M*P305
>
> However, I want to do it the other way around. I tried to calculate
> the inverse matrix but haven't succeeded. Does anyone have (or know
> how to create) the matrix/formula I need?
>
> It would be very helpful, thanks in advance.
>
> Anita
>
>
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