There is no upper limit to the number of MRIs that can be done in a year, as long as they are needed for a clear diagnosis of a disease. Magnetic resonance examination is one of the imaging tests that are mainly used to provide doctors with clinical diagnosis and treatment needs. MRI work is different from X-rays, CT and other diagnostic techniques that utilize radioactive imaging. The principle of magnetic resonance imaging is formed by the development of changes in the movement of hydrogen nuclei within a powerful magnetic field. Therefore, magnetic resonance does not produce ionizing radiation that is harmful to the human body and will not cause harm to the human body. Generally, as long as the diagnostic needs and the patient can afford the cost, the number of MRI examinations in a year is not fixed.