Re: [Freesurfer] Orientation by direction cosines

Hi Ritesh

I think that mri_info will try to figure this out and tell you (in the "Orientation" output).

cheers Bruce

On Fri, 25 Jan 2019, Ritesh Mahajan wrote:

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Hello Team,

Can any one please explain how we come to know whether it is RAI or RAS or any other orientation through direction cosines:

Below is the direction cosine: I saw some non zero and negative values in non diagonal values of matrix. What does this signify ?

0.999377 0 -0.0352819 -0.00916448 0.965676 -0.259588 0.0340709 0.25975 0.965075

Suppose it is Head First Supine. Any help will be really appreciated.

Thanks, Ritesh Mahajan

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