Run

mri_info --vox2ras-tkr orig.mgz

This will give you a 4x4 matrix M. Construct a vector P = [R A S 1]'. The index = inv(M)*P

doug

Guang Zeng wrote:

Hello, there,

I load lh.inflated of a subject using tksurfer, click a point (or vetex), then Click "Save Point")

Meanwhile, I load the same subject in tkmedit, select "goto save point", I can see the saved point.

If I try to convert multiple points (or vertices) from tksurfer to tkmedit, is there an equation?

I guess I am looking for the equation which can convert Vertex RAS to Volume Index.

Thanks! Guang

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