Evaluation of X-ray doses in paediatrics multislice computed tomography

Abstract

The present paper aims to examine the doses delivered to children at the paediatric Computer Tomography (CT) unit in the radiology service of the Mother and Child Hospital (MCH) in the Mohammed VI University Hospital Centre (Med VI UHC) of Marrakech, Morocco, and to compare our values with the dosimetric data of the published literature. This investigation included 440 CT examinations of the head, chest, and abdomen-pelvis in paediatric patients whose ages ranged from 1 to 5 yr (AG1y­5y), 5 to 10 yr (AG5y­10y), and 10 to 15 yr (AG10y­15y). We estimated the 75th percentile values of the Volume Computed Tomography Dose Index CTDIvol (mGy) and the Dose-Length-Product DLP (mGy.cm). The obtained results showed that the calculated 75th percentile of DLP for head CT are less than the National Diagnostic Reference Levels (DRLs) observed in Japan, Belgium, Germany, French, United Kingdom, United State, and China. However, the proposed DRLs for the abdomen-pelvis, and chest CT are significantly higher compared with international DRLs.