Reuse cement backer board?

Hey all, I'm helping my brother redo his kitchen floor. We got all the tiles up and the thin set surprisingly came off the backer board fairly easily and left a pretty clean, smooth and level surface with the exception of a few smaller gouges from the demo hammer.

Are we good to reuse the backer? Or can we save ourselves the trouble of ripping it up and just put an uncoupling membrane on top? I know it's redundant, but wondering if it might be easier than gutting. I tried adding photos but it keeps failing to upload