Previously, the physical examination of primary and secondary school students to do chest X-ray is a historical reason: in the past, China has not yet popularized the BCG vaccination of infants at birth, the main purpose of doing chest X-ray is to check the child with or without congenital heart disease and tuberculosis, and with the popularization of newborn babies to prevent tuberculosis bacillus infection of BCG vaccine, tuberculosis incidence has been greatly reduced, and it is no longer in the past, said the "incurable disease", so the child's routine physical examination to cancel the chest X-ray is perfectly fine.
Meanwhile, pregnant women are also the object of key protection. "Radiological Diagnosis and Treatment Management Regulations" clearly requires: 8 to 15 weeks after conception of women of childbearing age, shall not carry out radiological imaging of the lower abdomen, as far as possible to chest X-ray photography instead of chest fluorescence fluoroscopy examination. Women of childbearing age abdominal or pelvic nuclide imaging examination or X-ray examination before, first of all, to ask whether the pregnancy.