There is no radiation damage from MRI, so there is no specific clinical requirement for the interval between examinations. In terms of harm to the human body, because MRI technology is different from CT, ER and other X-ray imaging technologies, no radiation is produced during the examination, so there is no radiation or harm to the human body, so there is no specific interval time limit at present. In terms of diagnosis, MRI scan can be performed according to the condition of the disease or the need for clinical diagnosis and treatment, without the limitation of time and number of examinations, and even several times in a day, and if the condition requires imaging examinations, the interval may be about 3-7 days, so there is no need to worry. The current study proves that MRI is not harmful to the human body, so there is no need to worry too much, and the interval is not clearly defined at present.