Computed tomography has evolved into one of the most important diagnostic methods since its first introduction in 1972. With the development od multidetector and helical CT, many clinical applications have become more available than ever, because of the possibility to acquire data in a single breath hold. But one shortcoming is still present even in today's CT devices, and that is significant radiation dose for patients. That's why it's important to discuss about dose reduction methods and work on implementing them in everydays workflow. Radiation exposure from CT scans affects adults and children differently. Children are considerably more sensitive to radiation than adults because of their growing bodies and the rapid pace at which the cells in their bodies divide. In addition, children have a longer life expectancy than adults, providing a larger window of opportunity for radiation-related cancers to develop . Individuals who have had multiple CT scans before the age of 15 were found to have an increased risk of developing leukemia, brain tumors , and other cancers in the decade following their first scan. However, the lifetime risk of cancer from a single CT scan was small about one case of cancer for every 10,000 scans performed on children. The doses were significantly lower using low dose CT protocolwhile the image quality for lymph node presentation was satisfactory according to European criteria. Therefore the use of low dose CT protocol as a standard for patients with lymphoproliferative disorders is highly recommended. The reduction of mAs from 100 to 40 resulted in a significant reduction of the radiation doses to thelens and thyroid gland by 55.4% and 38.8% respectively without causing any significant effect to the diagnostic imagequality and assessment of the anatomical structures.