Through the years, computed tomographic examinations have increased in number both to adults and children. These examinations stands for the majority of the radiation dose to patients undergoing x-ray, and children are more sensitive to radiation than adults. The Purpose of this literature review is to find out how different protection techniques within computed tomography may be helpful when lowering the radiation dose is desirable for examinations of children. The Method is systematic literature review and we have collected, reviewed and compiled existing data (studies and articles). The Results we have found that there are various techniques that can be very helpful when you want to spare children radiation dose. Conclusion; the results show that it is possible to reduce the general ionizing radiation dose by the use of radiation protection (shielding) and automatic tube current modulation (optimization of protocols).