i am using Sienax for a cross-sectional volume comparison (GM and WM) between two groups.
I am using crop T13D NIfTI images and run sienax:
sienax co_image.nii -B "-f 0.22" -d
I've noticed that some images are well segmented or it is easy to modify them just moving "-f" option, however other images are very bad segmented because it was used a quite strange image. I attach both examples, respectively.
How is it possible if i proceed equally for all the analyses?
Any help would be very appreciated.