3dvolreg has been fast enough to do registration in
real time since 1988, so there is little need to speed
it up with OpenMP. Only some programs have been
enhanced with OpenMP support, as the author (usually
Bob) has seen fit.
3dAllineate is a more computationally intensive program
(plus it takes much longer than 3dvolreg to run), and so
Bob has enhanced it with OpenMP support, for example.
To be sure, exactly why are you wondering about this?
Is there some circumstance under which you believe
3dvolreg is not fast enough?
- rick
