I'm using sienax to quantify white matter volumes of the subjects in a sample. When I look sienax outputs with the following command:
sienax Control_coADR_371.nii -d
and i open the result of the white matter segmentation I_stdmaskbrain_seg_2.nii.gz, in the image I see that there are places that did not take into account the white matter and i believe it is because it uses a smaller mask (image attached: red = white matter, yellow = gray matter, blue = spinal fluid). It also happens if I use the command -B "f -0.3" and -r option. Is it right if I use these results even if there areas in which ignores white matter? or may be is there an option to increase sienax mask?
Thanks in advance!