[CT scans in children and adolescents: only when appropriate and when optimized].

Radiation exposure due to medical imaging has more than doubled in the Netherlands since the early 1990 s. There is increasing evidence that this is not without risk, especially in children and adolescents. A recent study in over 680,000 Australians < 19 years old at the time of imaging provides further evidence that CT scanning may induce excess cancer. In light of these findings it is of paramount importance that physicians dealing with this patient population only request CT studies if imaging is clearly indicated. New technological developments such as iterative reconstruction will ameliorate the risk for low radiation-dose malignancies, but continued vigilance is necessary.