This study assessed patient radiation exposure from chest computed tomography (CT) examinations across three diagnostic centers (A, B, and C) in Abuja, Nigeria. A total of chest 60 CT scan records were retrospectively analyzed, and radiation dose parameters including weighted CT dose index (CTDIw), dose length product (DLP), and effective dose were evaluated. Technical factors such as tube current (mAs), tube voltage (kVp), pitch, and patient body weight were also collected to determine their influence on dose variations. The mean CTDIw values were 5.49, 5.88, and 7.42 mGy.cm for Centers A, B, and C, respectively, while the corresponding DLP values were 271.48 ± 183.2, 253.32 ± 120.4, and 437.16 ± 433.5 mGy·cm. Effective doses to the chest were 4.62, 4.31, and 7.43 mSv. Centers A and B demonstrated relatively optimized protocols, whereas Center C consistently reported higher radiation metrics. Technical and demographic data revealed higher mAs (220 ± 35), tube voltage (120 kVp), lower pitch (0.9), and higher mean body weight (78 ± 12 kg) in Center C compared with Centers A and B, accounting for its higher dose indices. Compared with international benchmarks, results from Centers A and B were consistent with European and Turkish diagnostic reference levels (DRLs), while Center C exceeded some international thresholds but remained within Nigerian DRL frameworks. These findings highlight the influence of patient and technical factors on dose variation and emphasize the need for protocol harmonization to optimize patient safety without compromising diagnostic quality.
| Published in | American Journal of Physics and Applications (Volume 13, Issue 6) |
| DOI | 10.11648/j.ajpa.20251306.12 |
| Page(s) | 162-168 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2025. Published by Science Publishing Group |
Computed Tomography (CT) Machine, CT Dose Index, Dose Length Product, and Effective Dose, Local Diagnostic Reference Level
| [1] | Brenner, D. J., & Hall, E. J. (2007). Computed tomography—An increasing source of radiation exposure. New England Journal of Medicine, 357(22), 2277–2284. |
| [2] | United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). (2020). Sources, effects and risks of ionizing radiation: UNSCEAR 2020 report. United Nations. |
| [3] | Akinmoladun, J. A., Adeneye, S. O., & Adekanmi, A. J. (2021). Radiation dose optimization in diagnostic radiology: Challenges and prospects in developing countries. Journal of Radiation Research and Applied Sciences, 14(1), 12–20. |
| [4] | Huda, W., & He, W. (2012). Estimating cancer risks to adults undergoing body CT examinations. Radiology, 262(1), 53–63. |
| [5] | Omojola, A. D., Ogunseyinde, A. O., & Ibitoye, B. O. (2019). Patient radiation dose from diagnostic radiology procedures in Nigeria: Current status and future directions. Nigerian Journal of Clinical Practice, 22(6), 745–752. |
| [6] | International Commission on Radiological Protection (ICRP). (2007). The 2007 Recommendations of the International Commission on Radiological Protection (ICRP Publication 103). Annals of the ICRP, 37(2–4). |
| [7] | European Commission (EC). (1999). European guidelines on quality criteria for computed tomography. Report EUR 16262 EN. Luxembourg: Office for Official Publications of the European Communities. |
| [8] | World Medical Association. (2013). World Medical Association Declaration of Helsinki: Ethical principles for medical research involving human subjects. JAMA, 310(20), 2191–2194. |
| [9] | Deak, P. D., Smal, Y., & Kalender, W. A. (2010). Multisection CT protocols: Sex- and age-specific conversion factors used to determine effective dose from dose-length product. Radiology, 257(1), 158–166. |
| [10] | Mettler, F. A., Huda, W., Yoshizumi, T. T., & Mahesh, M. (2014). Effective doses in radiology and diagnostic nuclear medicine: A catalog. Radiology, 248(1), 254–263. |
| [11] | Atlı, E., Akata, D., & Karabulut, N. (2021). Radiation doses from head, neck, chest and abdominal CT: A multi-center study. Diagnostic and Interventional Radiology, 27(3), 147–154. |
| [12] | Røhme, L. A. G., et al. (2024). Image quality and radiation doses in abdominal CT: Results from a European survey. European Journal of Radiology, 169, 111087. |
| [13] | Ekpo, E. U., Adejoh, T., & (others). (2018). Results from the first Nigerian nationwide dose survey: proposed diagnostic reference levels. (PubMed abstract). Retrieved from |
| [14] | Ilupeju Y., Ibrahim U., Yusuf S. D., Mundi A. A. and Idris M. M (2021). Radiological Evaluation of Lead Apron Integrity in Five Selected Hospitals In Abuja, Nigeria. Journal of Radiography and Radiation Sciences, 35(1), 1-5. |
| [15] | Umar Ibrahim, Abdullahi A. Mundi, Musa Adamu, Idris M. Mohammed & Joseph Z. Dlama. (2018). Assessment of Radiation Dose to Patients during Head Computed Tomography Scan in some selected tertiary Health care Centers in Nigeria. Nigeria Journal of Medical Imaging and Radiation Therapy, 7(1), 33-38. |
APA Style
Yemisi, I., Mohammed, I. M., Samson, O. O. (2025). Evaluation of Patient Dose from Chest Ct Examinations in Selected Diagnostics Centres in Abuja, Nigeria. American Journal of Physics and Applications, 13(6), 162-168. https://doi.org/10.11648/j.ajpa.20251306.12
ACS Style
Yemisi, I.; Mohammed, I. M.; Samson, O. O. Evaluation of Patient Dose from Chest Ct Examinations in Selected Diagnostics Centres in Abuja, Nigeria. Am. J. Phys. Appl. 2025, 13(6), 162-168. doi: 10.11648/j.ajpa.20251306.12
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Download@article{10.11648/j.ajpa.20251306.12,
author = {Ilupeju Yemisi and Idris Mustapha Mohammed and Odeleye Olagoke Samson},
title = {Evaluation of Patient Dose from Chest Ct Examinations in Selected Diagnostics Centres in Abuja, Nigeria},
journal = {American Journal of Physics and Applications},
volume = {13},
number = {6},
pages = {162-168},
doi = {10.11648/j.ajpa.20251306.12},
url = {https://doi.org/10.11648/j.ajpa.20251306.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpa.20251306.12},
abstract = {This study assessed patient radiation exposure from chest computed tomography (CT) examinations across three diagnostic centers (A, B, and C) in Abuja, Nigeria. A total of chest 60 CT scan records were retrospectively analyzed, and radiation dose parameters including weighted CT dose index (CTDIw), dose length product (DLP), and effective dose were evaluated. Technical factors such as tube current (mAs), tube voltage (kVp), pitch, and patient body weight were also collected to determine their influence on dose variations. The mean CTDIw values were 5.49, 5.88, and 7.42 mGy.cm for Centers A, B, and C, respectively, while the corresponding DLP values were 271.48 ± 183.2, 253.32 ± 120.4, and 437.16 ± 433.5 mGy·cm. Effective doses to the chest were 4.62, 4.31, and 7.43 mSv. Centers A and B demonstrated relatively optimized protocols, whereas Center C consistently reported higher radiation metrics. Technical and demographic data revealed higher mAs (220 ± 35), tube voltage (120 kVp), lower pitch (0.9), and higher mean body weight (78 ± 12 kg) in Center C compared with Centers A and B, accounting for its higher dose indices. Compared with international benchmarks, results from Centers A and B were consistent with European and Turkish diagnostic reference levels (DRLs), while Center C exceeded some international thresholds but remained within Nigerian DRL frameworks. These findings highlight the influence of patient and technical factors on dose variation and emphasize the need for protocol harmonization to optimize patient safety without compromising diagnostic quality.},
year = {2025}
}
TY - JOUR T1 - Evaluation of Patient Dose from Chest Ct Examinations in Selected Diagnostics Centres in Abuja, Nigeria AU - Ilupeju Yemisi AU - Idris Mustapha Mohammed AU - Odeleye Olagoke Samson Y1 - 2025/12/09 PY - 2025 N1 - https://doi.org/10.11648/j.ajpa.20251306.12 DO - 10.11648/j.ajpa.20251306.12 T2 - American Journal of Physics and Applications JF - American Journal of Physics and Applications JO - American Journal of Physics and Applications SP - 162 EP - 168 PB - Science Publishing Group SN - 2330-4308 UR - https://doi.org/10.11648/j.ajpa.20251306.12 AB - This study assessed patient radiation exposure from chest computed tomography (CT) examinations across three diagnostic centers (A, B, and C) in Abuja, Nigeria. A total of chest 60 CT scan records were retrospectively analyzed, and radiation dose parameters including weighted CT dose index (CTDIw), dose length product (DLP), and effective dose were evaluated. Technical factors such as tube current (mAs), tube voltage (kVp), pitch, and patient body weight were also collected to determine their influence on dose variations. The mean CTDIw values were 5.49, 5.88, and 7.42 mGy.cm for Centers A, B, and C, respectively, while the corresponding DLP values were 271.48 ± 183.2, 253.32 ± 120.4, and 437.16 ± 433.5 mGy·cm. Effective doses to the chest were 4.62, 4.31, and 7.43 mSv. Centers A and B demonstrated relatively optimized protocols, whereas Center C consistently reported higher radiation metrics. Technical and demographic data revealed higher mAs (220 ± 35), tube voltage (120 kVp), lower pitch (0.9), and higher mean body weight (78 ± 12 kg) in Center C compared with Centers A and B, accounting for its higher dose indices. Compared with international benchmarks, results from Centers A and B were consistent with European and Turkish diagnostic reference levels (DRLs), while Center C exceeded some international thresholds but remained within Nigerian DRL frameworks. These findings highlight the influence of patient and technical factors on dose variation and emphasize the need for protocol harmonization to optimize patient safety without compromising diagnostic quality. VL - 13 IS - 6 ER -
Department of Medical Physics National Hospital Abuja, Nigeria
Department of Physics, Nasarawa State University, Keffi, Nigeria
Department of Radiology University of Maiduguri Teaching Hospital, Maiduguri, Nigeria
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