Integrated "Dicom Load Folder" variable into User Options, so it is remembered within and between the FVX sessions.

IDIF function:  corrected defect and logic bug when user asks to keep only X% of the brightest voxels.

Concentration curve obtained directly from NUFFT dataset (JD)

a) Cortex peak timepoint                                      b) Last timepoint

Difficult case for registration in FLASH sequence.  At the moment a) to b) is not possible to register well.