First of all, we should be clear about the concept of harmful, Baidu Chinese interpretation is destructive, may have fatal results, common smoking is harmful to health, spitting is harmful to public health and so on. Magnetic resonance imaging (MRI), as a non-invasive functional examination of the human body, can only be widely used in countries around the world if it is safe and reliable and beneficial for disease diagnosis, and, like ultrasound, current research has not found that MRI is harmful to the human body, provided that the examination is done in a safe framework (there are contraindications to doing the examination and safety measures to do the examination – -MRI safety management Chinese expert consensus); talk about nuclear is afraid of nuclear radiation, MRI nuclear refers to the nucleus of hydrogen atoms, through the magnetic field and detector excitation to detect the energy signal of hydrogen protons in water. In layman’s terms, it is like taking a picture under a flash, the camera first emits light and then collects the reflected light for imaging, so MRI is not only free of nuclear radiation but also free of X-ray ionizing radiation from CT, but of course every examination has its advantages and disadvantages, and the safety management of MRI is particularly important, there is no shortage of violations of safety norms at home and abroad, and strong magnetic force attracts ferromagnetic objects causing destructive and even fatal results. In January this year, a case occurred in India, a man with oxygen cylinders inhaled magnets, and eventually died; the lesson is profound safety first, no matter what means of examination must be completed within the safety range, which requires the cooperation of doctors, patients and family members, the goal is to ensure that patients do not receive a test, and what serious damage to the body, of course, because of the choking concern is completely unnecessary. Experienced physicians will make the appropriate judgments based on the patient’s medical history and condition, whether to do it or not, and when to do it, and they will prefer the test that is most conducive to showing the lesion, most cooperative to the patient, and has the least impact on the patient. MRI, a non-invasive medical examination, is very much in line with the natural medicine concept of non-invasive treatment. The purpose of natural medicine functional examination is to detect potential signs of the body and precursors of disease at an early stage before the loss of function gradually becomes a disease, to diagnose early, to start personalized treatment before it develops into a disease, and even if it has developed into a disease, to detect early intervention for changes in the disease to prevent the disease progression or serious complications, it will examine the body’s systems and organs in a network of correlations to find the underlying causes that directly and indirectly affect organ function and system imbalances. Magnetic resonance imaging (MRI) is a typical representative of natural medical functional examinations in the context of high-tech development.