Mahmoud, Albadarneh Laith Khaled (2025) Evaluation Of Radiation Dose For Common Computed Tomography Assessment In North Of Jordan. PhD thesis, Perpustakaan Hamzah Sendut.
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Abstract
The increasing use of computed tomography (ct) necessitates careful evaluation of radiation exposure and associated cancer risks. This study investigates the lifetime attributable risk (lar) of cancer from radiation in common ct scans and analyzes dose variations across scanner protocols. Using the beir vii linear non-threshold (lnt) model and virtualdose™ monte carlo simulation software, organ and effective doses were estimated, and diagnostic reference levels (drls) were proposed to optimize radiation doses in jordan. Results showed a decrease in lar with age, with the highest risks observed in younger patients (18–19 years), especially for lung cancer (71 males and 124 females per 100,000 scans). Females generally exhibited higher lar than males. Average brain doses were 14.20 mgy, while effective doses ranged from 1.74 to 3.08 msv. Lung doses were higher in males (24.51 mgy) compared to females (10.81 mgy), while females received slightly higher doses for the stomach, colon, and liver. The ct dose index volumetric (ctdivol) and dose length product (dlp) varied significantly across scanner models, with ge and siemens (64-slice) scanners showing lower values compared to toshiba scanners. Jordanian drls were found to be higher than compared international studies, indicating the need for dose optimization.
| Item Type: | Thesis (PhD) |
|---|---|
| Subjects: | Q Science > QC Physics > QC1 Physics (General) |
| Divisions: | Pusat Pengajian Sains Fizik (School of Physics) > Thesis |
| Depositing User: | Mr Hasmizar Mansor |
| Date Deposited: | 27 Apr 2026 02:13 |
| Last Modified: | 27 Apr 2026 02:13 |
| URI: | http://eprints.usm.my/id/eprint/63989 |
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