Rescue Boat Crews Show Signs of Brain Injuries, but Coast Guard Isn't Looking

Anomalous brain scans could someday be routine checkups, if we could use ultrasound or something. This was a decade ago:

Can a Combination of Ultrasonographic Parameters Accurately Evaluate Concussion and Guide Return-to-Play Decisions? (2015) - https://pmc.ncbi.nlm.nih.gov/articles/PMC4549191/