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In many clinical scenarios, Computed Tomography has a dramatic evolution which has drastically improved the diagnostic performance and enhanced its field of application. Due to its increased usage nowadays, children are at higher risk of radiation-induced cancer compared to adults which has led to increased biologic sensitivity to ionizing radiation which has resulted in more time for potential radiation-induced cancer to develop. Hence, the aim of the present study was to analyse the method among paediatrics to reduce radiation dose in computed tomography of brain. Material and methods: The present study was a retrospective study which was conducted among pediatric population which was further subdivided in three groups based on patient age as: 0–4, 5–9, and 10–14 years. Various parameters such as tube voltage, tube current, tube rotation time, acquisition mode (sequential or helical), beam pitch (for helical CT studies), detector configuration, automated tube current modulation (enabled or disabled), CT dose index (CTDI), and doselength product (DLP) were used. For analysis of image, examination consisted of scout images plus a stack of 2.5-or 3-mmthick axial images were analysed in the study. Results: In the present study, out of 100 subjects, 34 and 38 subjects were scanned with the help of 350 mAs and 120 kVp and 28 were scanned with the help of 200-300 mAs. It was found that in the age group 0-4 years; tube current time was kept at 240 mAs and 57.9 kV followed by 280 mAs and 61.2 kV for 5-9 years. For the 10-14 years age group, 310 mAs was the tube current time followed by 82.4 kV tube voltage settings. Conclusion: These methods can be effective in reducing radiation dose while preserving diagnostic image quality in pediatric head CT examinations.

Method of Reducing the Radiation Dose to the Paediatric Age Groups in Computed Tomography