I think we're talking a little bit about different things too. There's the one goal of identifying CTE, which is a chronic sequela, presumed due to multiple concussions. I think the research is certainly going off in that range. We're learning more and more each day, and I think those things are very important.
I think the other area, which is in high-intensity research, looking probably more at the sport level and the acute concussion level, is the immediate diagnosis of concussion. It relates to what you're saying about PTSD, so often associated with injury, more often outside of sport than inside of sport. There's an emotional reaction that we often talk about, PTSD, and some of the symptoms can be similar to those of a concussion.
The other thing is that we're looking for markers—or biomarkers, if you will—that would suggest you've actually had resolution of your concussion. When is it safe to return? A case in point would be an example like Rowan Stringer. Clearly, she was a person who had evidence of concussion, when they went through and looked at the record, and yet continued to play. Now through prevention and other strategies in this day and age, we would identify it, first of all. That's probably one of the many failures in the system that occurred, which Dr. Tator is referring to, and we need to remedy, but it would be ideal to identify those who actually had a concussion urgent injury.
There are experimental imaging techniques. Conventional imaging such as a CT or MRI generally shows normal, and we consider it actually a more severe brain injury if it's not normal. However, we do know certain MRI protocols, like diffusion tensor imaging and other types of protocols like SWI, can show concussions acutely. The problem is that it can't be used diagnostically at this point in time. But these things need to be explored. There are also biomarkers such as SB100 which, if it's in more severe cases, is a better pickup, but when it's in the milder cases won't pick up. So I think for the acute markers—