Atefeh Tahmasebzadeh - Research Committee, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
Asghar Maziyar - Radiation Biology Research Center, Iran University of Medical Sciences, Tehran, Iran
Reza Reiazi - Department of Radiation Physics, Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX ۷۷۰۳۰, USA
Mojtaba Soltani - Social Determinants of Health Research Center, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran

Background: The purpose of this study is to evaluate the effective dose (ED) for computed tomography (CT) examination in different age groups and medical exposure in pediatric imaging centers in Tehran, Iran. Methods: Imaging data were collected from ۵۳۲ pediatric patients from four age groups subjected to three prevalent procedures. National Cancer Institute CT (NCICT) software was used to calculate the ED value. Results: The mean ED values were ۱.۶۰, ۴.۱۶, and ۱۰.۵۶ mSv for patients’ procedures of head, chest, and abdomen–pelvis, respectively. This study showed a significant difference of ED value among five pediatric medical imaging centers (P < ۰.۰۵). In head, chest, and abdomen–pelvis exams, a reduction in ED was evident with decreasing patients’ age. Conclusion: As there were significant differences among ED values in five pediatric medical imaging centers, optimizing this value is necessary to decrease this variation. For head CT in infants and also abdomen–pelvis, further reduction in radiation exposure is required.

Computed tomography scan, effective radiation dose, National Cancer Institute CT (NCICT), pediatric