CT examinations are more radioactive than radiographic examinations because X-ray radiographic examinations are only 1-2 exposures of the lesion, while CT examinations are equivalent to doing multiple X-rays, which is also the superiority and characteristic of this machine, and tomographic scans of the lesion, with 1 exposure for each scan. Although the amount of radiation is different each time compared to X-rays, the cumulative amount of multiple exposures will be greater than the radiation of X-rays. But even if the amount of radiation accumulated for each CT exposure, there is no particular damage to the body, far from the standard of damage to the body, there is no need to worry. And before doing CT examinations, doctors will also make a comprehensive judgment, such as pregnant women or children of particularly young age, most will not do the examination with a large amount of radiation.