Itıs hard to know from that context what they are referring to. Perhaps if you posted a larger quote of the comment someone could figure out what the reviewer meant. Peace, Matt. From: Abbie Williams <[log in to unmask]> Reply-To: FSL - FMRIB's Software Library <[log in to unmask]> Date: Monday, July 7, 2014 at 2:40 AM To: <[log in to unmask]> Subject: [FSL] weakness Dear all, I am using FSL for a DTI analysis. In a paper revision I have been told that TBSS has weaknesses on revealing tract-specific features. I am not sure what does it mean. Could anyone help me? Thanks in advance. Regards, Abbie