Assessment of cerebral perfusion symmetry in retired Canadian Football League players

High contact sports such as American football can
result in athletes sustaining concussions and countless sub-concussive
blows, leading to cumulative neurological damage [1]. This study
aimed to use cerebral blood flow (CBF) measured with ASL and a
Z-scoring approach to quantify focal brain damage and left/right
symmetry in retired Canadian Football League (rCFL) players. It was
hypothesized that subjects would have asymmetric CBF and regional
hypoperfusion due to their history of repetitive head trauma.