Most of the general film taking refers to taking X-rays, of course, there are many examinations now, including CT, MRI, ECT, SPET-CT, bone density, etc. X-rays have a certain amount of radiation to the human body, but it is very small, and we can avoid these rays as long as we go through normal protection. We routinely take a chest X-ray, the amount of radiation is very small and will not cause harm to the human body. The magnetic field of MRI is harmless and will not cause harm to human body. Therefore, when pregnant women and children need to do X-ray examination, we must be cautious, strictly grasp the indications, and try to avoid unnecessary and repeated overdose examination, so as not to cause harm to the human body.