-15-
H-preserve
¨ once it has been determined that the
output voxel will be part of 
the
ROI, preserve the original ROI value of that voxel (and not some fraction
of that value). For example, if
our ROI mask has values of Ò4Ó:
the
ROI, preserve the original ROI value of that voxel (and not some fraction
of that value). For example, if
our ROI mask has values of Ò4Ó:¥3dresample
does this conversion as well:
3dresample -master func+orig
-inset
ROI_high_res+orig-rmode
NN-prefix
ROI_low_resH-master func+orig: the destination
grid we want our ROI mask resampled to
H-inset ROI_high_res+orig: The ROI
mask dataset that is being resampled from
high to low resolution
from
high to low resolutionH-prefix ROI_low_res: The output from 3dresample -- a low res ROI mask that
corresponds with the voxel resolution of our functional dataset
that
corresponds with the voxel resolution of our functional datasetH-rmode NN: If a voxelÕs ÒneighborÓ is
included in the ROI mask, include the voxel in
question as well
in
question as wellThis
voxel is 80% filled with the ROI value -- keep it.
Without the -preserve option, this voxel would be given a value of Ò3.2Ó (i.e.,
80% of Ò4Ó).
With -preserve, it is labeled as Ò4Ó