[Correlation study between brain damage and anxiety, depression, and cognitive impairment in patients with moderate to severe obstructive sleep apnea hypopnea syndrome using diffusional kurtosis imaging].

To explore the brain white matter damage in patients with moderate to severe obstructive sleep apnea hypopnea syndrome(OSAHS) using diffusional kurtosis imaging(DKI), and to analyze its relationship with anxiety, depression and cognitive impairment in patients.