Patient: Description of condition (onset, main symptoms, hospital visited, etc.): One year and four months old baby was born with a somewhat crooked chin, high left and low right (not too obvious), and the teeth bed is also high left and low right, which is hard to see from the outside and not obvious. We thought it would get better slowly, but now we are one year and four months old and it is still like this (the only comfort is that it is not serious). We are afraid that this condition will affect the baby’s appearance when he grows up. We went to Wuhan Hospital’s Department of Stomatology and had a CT facial 3D reconstruction, and the doctor said that the problem was not serious, but that the bones were a little high and low, and that the doctor would correct it after three years of age. But now I am worried about one thing, I heard people say that CT is particularly harmful to the human body, our baby is only one year and four months old, the CT is not a normal plane CT, it is a three-dimensional CT, is the amount of radiation more than usual, will it have an impact on the future development of the baby, I am very worried about this. Medical imaging department Wang Xiaole: There is radiation during the CT plane scan, but the 3D reconstruction is a post-processing work of the original data, there is no radiation. Patient: Will the radiation from such a CT scan have any effect on such a small baby or affect his intelligence? Medical imaging department Wang Xiaole: Radiation is definitely damaging to the human body and definitely has an impact on the growth and development of children. But this can not be measured by a scientific standard, nor can we determine the assessment of the future. But many children around are exposed to X-rays to one extent or another during their life, study and growth from childhood to adulthood for one reason or another, such as pneumonia, fracture or physical examination. At least there are no reports of radiation damage in children as a result of one or two routine exam doses in general. There is no need to be overly concerned.