Mask an image or a volume according to a mask
reference file. This operation will retain image values
from the original image wherever the corresponding location
in the reference image is >= 0.5. If the corresponding
location in the reference image is < 0.5 the image value
will be replaced with a background value.
.MASK REFERENCE FILE: MAS001
[Enter mask reference file containing values >= 0.5 where
INPUT2 file is to be passed, and < 0.5 where elements in
input are to be replaced by a background value.]
.IMAGE (OVERWITTEN!): IMA001
[Enter name of image or volume file to be masked. This
image or volume file will be overwritten by the masked
output image.]
.ENTER BACKGROUND: 0.8
[Enter value of background to be used in masking.]