MRI is an important imaging test to diagnose diseases, but there are a few patients that doctors do not recommend to do this test: 1, claustrophobic patients: Patients suffering from claustrophobia are not recommended to do MRI, because they enter a more closed environment will appear different from the normal performance, such as nervousness, fear, near-death feeling, etc., and MRI is needed to enter this environment to complete, the patient is likely to Therefore, doctors do not recommend MRI for such people; 2. Pregnant women: especially in the first trimester of pregnancy, MRI is not recommended because this is a critical period for the growth and development of the fetus, and the process of MRI will generate a lot of noise and energy, which may affect the growth and development of the fetus; 3. Patients with metal products such as pacemakers, metal braces in the mouth and steel plates at fractures in the body are not recommended to do MRI because the MRI machine has a strong magnetic field, which may interfere with the normal work of the pacemaker, or the metal products may affect the imaging of MRI, leading to a decrease in imaging quality and affecting the judgment of the disease; 4, examination site: the imaging principle of MRI is to use the magnetic field to cause the position of water molecules in the body to Some parts of the body have less water, more gas, or non-stop pulsation, such as the stomach and heart, which cannot be imaged clearly and may affect the judgment of the disease, so the doctor will not recommend MRI; 5, price reasons: Because the price of MRI is based on the part of the charge, the price is relatively high, for patients who do not need to carry out MRI testing, the doctor will not recommend MRI. For patients with diseases that do not require MRI, doctors will not recommend MRI to help reduce unnecessary expenses for patients. Although MRI can assist in the diagnosis and treatment of most tumors or substantial lesions of internal organs, it is not absolute and necessary, and patients still need to follow the doctor’s diagnosis and examination recommendations for the treatment of diseases.