The goal of this observational study is to learn about in The value of multimodal MR Imaging in cognitive assessment of patients with moderate traumatic brain injury. The main question it aims to answer is: • The construction of the core injury model of cognitive impairment caused by moderate brain trauma takes multi-parameter MR scanning as the main line of research, centering on the analysis of cognitive impairment of white matter structure damage and brain function involved in the research institute, and conducts research on key scientific issues such as the validity verification of cognitive prognosis after moderate brain trauma. Participants will be collected for MR, hematology and stool and neuropsychological Scale indicators in the study.