[MINC-users] N3

[Alex ZIJDENBOS]

On Tue, Nov 01, 2005 at 11:25:42AM -0500, elo at neurorx.com wrote:
> 
> We in fact find that running nu_correct several times (with the same
> parameters) yields the best results in terms of image uniformity.  This
> may be because different gaussian modes are targeted and corrected.  For
> our MRI images, applying repeated nu_corrects (about 6 times), produces
> the best results.

This has been reported by others as well, but I still find this
puzzling. Given the iterative nature of N3, why would running it
multiple times produce results different results from running it
longer (more iterations)? Is there something fundamentally different
between nu_correct's internal loop, versus imposing an external loop?
John (Sled) - any thoughts?

-- A