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Radiation dose in paediatric CT during and after changes
EP34191
Poster Title: Radiation dose in paediatric CT during and after changes
Submitted on 21 Oct 2020
Author(s): Berglind Eik Ólafsdóttir, Jónína Guðjónsdóttir
Affiliations: University of Iceland, Faculty of Medicine, Landspítali University Hospital, Akureyri Hospital, Icelandic Radiation Safety Authority
This poster was presented at BIR Annual Congres 2020
Poster Views: 132
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Poster Information
Abstract: Purpose: The aim of this study was to assess the change in paediatric CT over two years who included equipment renewal.

Methods: Data was collected retrospectively for all paediatric examinations in the year 2018 from three radiology departments. Dose data was categorized in five age groups for the four most common body parts. Based on the collected data an advice on dose optimization was given to the largest department, in which new equipment was being installed (late ´18 through early ´19). The effect was evaluated by gathering identical dose data for the year 2019 and then analyse the difference, where enough data was available, between four six months periods. The first and last periods represent the status pre and post changes.

Results: The total number of studies was 2068, 15.8% increase between years. The most common age group was 8-14 years and CT head was the most common body part examined. Significant dose reduction (p<0.05) was seen in the age groups 2m-2y, 8y-14y,15y-18y for head, and in addition in abdomen in the age group 3y-7y. 19,1% of patients were in the age group 15-18 years but for the abdomen, thorax and sinuses examinations in that age group it was not possible to confirm any dose reduction.

Conclusions: New equipment and dose optimization advise resulted in dose reduction in some, but not all, examinations. It was noted that adult protocols were often used for the oldest children which may explain the unexpected results.
Summary: Radiation dose in paediatric CT during and after changes in the year 2018 and 2019. From three radiology departments in Iceland.
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