Epidural hematoma is a hematoma that accumulates in the epidural cavity after trauma. The typical clinical presentation is coma – awake – coma again, mostly occurring within a few hours to 1 to 2 days after the injury; CT shows a high-density shadow in the shape of a shuttle below the inner plate of the skull with sharp borders, mostly seen at the site of skull fracture, especially in the area where the fracture line passes through the middle meningeal artery or venous sinus. Generally, the fracture line should not cross the cranial suture. If the fracture line crosses the cranial suture, the hematoma may cross; MRI shows acute phase: T1 isosignal, T2 low signal, subacute phase and chronic phase: T1, T2 high signal. Subdural hematoma is a hematoma that occurs between the dura mater and the arachnoid, and is one of the most common intracranial hematomas. The clinical condition is critical, develops rapidly, and presents a gradual increase in the degree of coma; CT shows a wide range of crescent-shaped shadow that can cross the cranial suture and even cover the entire cerebral hemisphere, MRI: acute: T1 isosignal, T2 hyposignal, subacute: T1 and T2 high signal, chronic: T1 low signal, T2 high signal.