CT examination is a relatively common clinical examination method, but CT examination has ionizing radiation, how should we correctly conduct CT examination to avoid harm to the body? Here we come to a detailed understanding. 1, CT examination we should be how to protect? The advantages of CT examination are unparalleled, in the CT examination, non-examination parts are also susceptible to ionizing radiation. Different parts of the examination on the sensitivity of CT examination is different, of which the thyroid gland, the reproductive system is the most sensitive, in the CT examination of non-this part should be well protected. The thyroid gland, i.e. the neck area, is surrounded by a good neck lead protector, and the area where the reproductive system is located, i.e. the pelvis, is covered with a lead quilt to shield the radiation and reduce ionizing radiation. 2.How many times a year does a normal person undergo a CT examination? The harm of CT examination for the body comes from the ionizing radiation produced by radiation, the body itself will be subjected to excessive ionizing radiation changes in the structure and function of biomolecules, the relevant cells, tissues and organs to reduce the activity of the human body, the severity of the injuries will be increased with the increase in the dose of the X-ray irradiation received. Normal people will absorb a dose of about 1 mSv for an examination, and it is recommended that you do not exceed two CT examinations a year unless necessary, which is the most suitable. 3. What are the precautions for CT examination? Remove metal objects from the scanning area, such as necklaces, keys, watches, etc., before entering the CT examination room. Metal objects can produce artifacts and affect the examination results. Cooperate with the doctor and follow his/her instructions for the examination, complete the examination in the shortest possible time and try to avoid repeating the examination. Pregnant women and children are not recommended to undergo the examination unless it is very necessary. Especially pregnant women in the first 3 months of pregnancy may cause fetal malformation, hematopoietic system defects, craniosynostosis and other serious consequences. 4.What should I pay attention to after CT examination? The radiation in the body will be gradually metabolized after about half a year after a CT examination. After the examination, it is necessary to pay attention to rest, consume more food containing vitamin C, and eat practical food rich in iodine to help excretion.