¥Step 1: Load a dataset to be edited (for ROI creation):
H [Choose Dataset] button gives you a list of datasets that
å(a) Actually have brick data with only one
sub-brick;
å(b)
Are at the same voxel dimension, grid size, etc., as current anat underlay
HWhen you are
starting, you probably donÕt want to edit an existing dataset -- i.e., you donÕt want to
write on the underlay itself; you just want to use it as a template and draw on a
blank overlay that shares the same geometry as that existing underlay
dataset
åTo do this, you must
create an all-zero copy of the anatomical underlay (by ÒcopyÓ we mean the
all-zero dataset shares the same geometry as the underlay, not the same
voxel data values)
åTo create an
all-zero copy, click the [Copy]
button on (from the Draw
Dataset plugin GUI) and set the controls to its right to [Zero] and [As Is] (the [Func] button is a
relic of the program and is now obsolete -- ignore)
í [Data] would make a copy of the underlay dataset with the actual voxel data values. [Zero] copies the geometry of underlay, but gives each voxel a data value of
zero (this latter option is usually want you want when starting out)