These improvements were with 60 dives. It is probable that additional dives would bring additional benefit. Correct me if I'm wrong but this is also the first time that DTI changes have been linked to cognitive improvements.

Also, here is an example of what you're looking for. The testing results are at the end of the video. This was with 40 dives for this man. I'd also have to say the look on his face alone before and after says it all. This man is CLEARLY leading a more normal life.

Navy/Army Veteran before and After HBOT - YouTube

Also this thread:

My Hyperbaric Oxygen Therapy Experience (HBOT)

So there's two examples.