mri_info will do it. If you just want the orientation string, you can 
add  --orientation. Or do you still want the interpretation of the matrix?

On 1/25/19 10:10 AM, Bruce Fischl wrote:
> 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:
>
>>         External Email - Use Caution
>>
>> 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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>>
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