Assessment of radiation risks in adult CT brain procedures in Morocco: A multihospital study in rabat region.

Abstract

Author(s): Walia Allah Amine, Sebihi Rajaa, Raoui Yasser

The objective of this investigation was to assess the radiation dose of patients undergoing CT brain examinations across three distinct modalities of CT scanners (16 slices, 64 slices, and 128 slices), as well as to analyze the associated biological effects within the context of Moroccan hospitals. A total of 150 patients participated in CT brain examinations conducted at three separate hospitals in Morocco. Data were obtained from a total of 50 CT scans performed in each hospital. The data that collected for For each examination included scanner acquisition parameters, number of series, use of the contrast medium, and rotation time as well as slice thickness, the displayed Computed Tomography Dose Index (CTDIvol) and the Dose Length Product (DLP). The assessment of cancer and hereditary risks was conducted using conversion factors provided by the International Commission on Radiological Protection (ICRP). The patients included in this study were an average age of the 56.33 years ± 20.70 years. The average radiation doses for CT brain scans were determined to be 695.61 mGy·cm ± 48.62 mGy·cm for 16 slice scanners, 890.83 mGy·cm ± 56.52 mGy·cm for 64 slice scanners, and 834.05 mGy·cm ± 161.58 mGy·cm for 128-slice scanners. The calculated patient cancer risks per procedure ranged from 9.10 per 10⁵ CT to 11.75 per 10⁵ CT procedures, with rates of 9.10 per 10⁵ CT, 11 per 10⁵ CT, and 11.75 per 10⁵ CT procedures observed for 16-slice, 64-slice, and 128-slice scanners, respectively. Meanwhile, patient hereditary risks ranged from 3.31 per million to 4.27 per million CT procedures, with corresponding rates of 3.31, 4, and 4.27 for 16 slice, 64 slice, and 128 slice scanners, respectively.

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