I am having trouble with one of my skull strips, and getting very extreme results. When I re-run the skullstrip using different watershed values, anything at 56% or below takes 75%+ of the brain out, and as soon as I jump to 57% or higher, it leaves on almost all of the skull, except for maybe 5% of it. Is this indicative of a more complicated problem, and what is my next step (other than manually taking off the skull), if any? Thanks