Absorbed radiation dose in adult brain CT-examination at Rasheed Shekoni Teaching Hospital, Dutse, Jigawa State, Nigeria

Abstract

Accurately assessing radiation dose levels in computed tomography (CT) imaging is critical for optimizing patient safety and ensuring adherence to diagnostic reference levels (DRLs). This study acquired data from the CT dose index registry to evaluate the absorbed radiation dose levels for adult brain CT examinations conducted at Rasheed Shekoni Teaching Hospital Dutse, Jigawa, Nigeria. 162
adults (male and female) patients (≥18 years), were analyzed (January 2016 to August 2023) to determine the mean, mode, and 75th percentile values for volume CT dose index (CTDIvol) and dose length product (DLP). The mean CTDIvol and DLP for adult brain examinations were 69.18 mGy and 1421.21 mGy·cm, respectively, while the 75th percentile values were 82.14 mGy and 1705.78 mGy·cm,
comparable to dose values reported from local and international literature. This study's 75th percentile CTDIvol values were consistent with reports from other findings. However, the corresponding DLP values were considerably higher than those observed in several countries and other regions within Nigeria. These findings highlight the need for institutional evaluation of CT radiation doses to establish DRLs that reflect both local practices and international standards. While the alignment of CTDIvol values demonstrates adherence to acceptable dose benchmarks, the elevated DLP values necessitate strict quality assurance and dose optimization measures. This will enhance patient safety and support effective health management strategies at Rasheed Shekoni Teaching Hospital and other healthcare institutions that work with similar procedures.