An MRI of the head is necessary after a fall in the elderly. Elderly people are prone to traumatic brain injury and intracranial hemorrhage after a fall. The advantage of MRI is that it can clearly show the subtle neural structure changes. After a fall, elderly people can more accurately determine whether there is scalp injury, edema, brain tissue contusion, cerebral edema through MRI, but the sensitivity for cerebral hemorrhage and skull fracture is not as good as cranial CT. MRI, or magnetic resonance imaging, is the main imaging technique for various intracranial diseases, and can also be used as the preferred examination method for diseases such as hyperacute cerebral infarction and brain metastases, and is an important supplement to CT examination. MRI is prohibited if there is a metal internal fixation or pacemaker in the patient’s body. If there is a fall in the elderly, they should consult the doctor in time, actively cooperate with the doctor to improve the relevant examination, and follow the doctor’s instructions for treatment.