Fig. 3

Percentages of exams within the ten most common study common names in two different age ranges: 18–109 (a) and 0–17 (b). The main differences between the two distributions are the presence of many exams with a broad scan length including different anatomical regions in adult pie chart and the almost total absence of exams with contrast agent in paediatric ones. The majority of paediatric exams were in the head region compared to the adult distribution, with more “CT Maxillofacial WO” (traumas, sinusitis) and the addition of “CT Teeth”. The higher percentage of exams in the “OTHER” in the paediatric distribution could be related to the greater difficulty of the diagnosis in the absence of clinical history and with symptoms described by children