Volume 15, Issue 8 · IJARST · ISSN 2319-1783 / 2320-1126

Estimation of Lifetime Attributable Cancer Risks from Head and Abdomen Computed Tomography (CT) Examinations

Estimation of Lifetime Attributable Cancer Risks from Head and Abdomen Computed Tomography (CT) Examinations is an open-access, peer-reviewed research paper by Shaiful Kabir, Md. Abadat Hossain, Md. Main Uddin, Sinthia Binte Kholil, Afia Begum, Aleya Begum, published in Volume 15, Issue 8 of the International Journal of Advanced Research in Science and Technology (IJARST), a UGC-approved journal (Print ISSN 2319-1783, Online ISSN 2320-1126).

Author

Shaiful Kabir, Md. Abadat Hossain, Md. Main Uddin, Sinthia Binte Kholil, Afia Begum, Aleya Begum

Abstract

Computed tomography (CT) examinations contribute substantially to patient radiation exposure and may increase the risk of radiation-induced cancer. Estimating these risks is essential for optimizing radiation protection and supporting appropriate clinical use of CT imaging. This cross-sectional study included 76 patients undergoing head and abdomen CT examinations at Square Hospital, Dhaka, Bangladesh. Radiation doses were measured using thermoluminescent dosimeters (TLDs) and a 64-slice CT scanner. Effective doses were calculated from the dose-length product (DLP) using age-dependent conversion coefficients recommended in the European Guidelines on Quality Criteria for Computed Tomography (European Commission, EUR 16262 EN). Organ doses were converted into lifetime attributable risks (LARs) of cancer incidence and mortality using the Biological Effects of Ionizing Radiation VII (BEIR VII) risk model. LAR varied according to CT examination type, patient age, sex, and absorbed dose. For abdomen CT, the mean LAR of cancer incidence was 22.4 and 13.3 per 100,000 persons in males and females, respectively, with corresponding mortality risks of 5.2 and 4.1. For head CT, the mean LAR of cancer incidence was 136 and 113 per 100,000 persons, with mortality risks of 80.3 and 60.6, respectively. Younger patients demonstrated higher estimated risks, and effective dose increased with both DLP and tube current time product (mAs). Although the estimated LAR associated with head and abdomen CT examinations was relatively low, cancer risk varied according to patient age, sex, examination type, and radiation dose. The findings support patient-specific CT protocols and optimization of scanning parameters in accordance with the ALARA principle to minimize radiation exposure while maintaining diagnostic image quality, particularly for younger patients and higher-dose CT examinations.

Keywords: Computed tomography; radiation dose; effective dose; organ dose; lifetime attributable risk.

DOI: https://doi.org/10.62226/ijarst20262764

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DOI

10.62226/ijarst20262764

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How do you cite this paper?

Shaiful Kabir, Md. Abadat Hossain, Md. Main Uddin, Sinthia Binte Kholil, Afia Begum, Aleya Begum — “Estimation of Lifetime Attributable Cancer Risks from Head and Abdomen Computed Tomography (CT) Examinations.” International Journal of Advanced Research in Science and Technology (IJARST), Volume 15, Issue 8. DOI: 10.62226/ijarst20262764.

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