FGT processing update:

1. Preliminary results on 4 phantoms with about 200 manual seeds each indicate x4-5 times improvement of BiCal over N3.

2. After fixing the BiLaplace fitting procedure, the phantom histogram splits start to look great. But no great conclusions till the whole set is done.  See below (case p1s1_R.fvx)

Histogram fitting using Bimodal Laplacian (after BiCal)