Mahazeli, Wan Nurul Ain Wan (2025) A study of radiation dose from computed tomography (CT) simulation scan in brachytherapy treatment. Project Report. Universiti Sains Malaysia. (Submitted)
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Abstract
Brachytherapy is a form of internal radiation therapy that relies on precise imaging for accurate applicator placement and treatment planning. This study aimed to evaluate the radiation dose delivered during CT simulation scan for brachytherapy treatments involving liver, tongue, and endometrial cancers. Ensuring patient safety while maintaining image quality is essential, as excessive imaging doses contribute to overall radiation exposure. Method: A retrospective analysis was conducted on CT simulation scan parameters and dose metrics, including volume Computed Tomography Dose Index (CTDIvol) and Dose-length product (DLP), collected from 46 patients across the three treatment sites. The collected data were compared against international Diagnostic Reference Levels (DRLs) set at the 75th percentile to determine compliance. The CTDIvols for liver, tongue, and endometrial cancer were 46.42, 32.76, and 54.20 mGy, respectively. Meanwhile, DLP values for liver, tongue, and endometrial cancer were 1496.0 mGy.cm, 1893.1 mGy.cm, and 1585.5 mGy.cm, respectively. The data revealed that the majority of scans were under permissible dosage limits; liver, tongue, and endometrial cancer were 46.42 mGy, 32.76 mGy, and 54.20 mGy, respectively, while DLP values were 1496 mGy.cm, 1893.10 mGy.cm, and 1585.5 mGy.cm. However, instances of elevated CTDIvol and DLP were identified, particularly in endometrial cases due to thinner slice thickness and complex pelvic anatomy. In conclusion, this study highlights the need for continued monitoring and protocol optimisation to minimise unnecessary radiation exposure during CT simulation for brachytherapy, supporting the ALARA principle and promoting safe imaging practices.
| Item Type: | Monograph (Project Report) |
|---|---|
| Uncontrolled Keywords: | brachytherapy, CT simulation |
| Subjects: | R Medicine R Medicine > RA Public aspects of medicine > RA440-440.87 Study and teaching. Research R Medicine > RC Internal medicine > RC254-282 Neoplasms. Tumors. Oncology (including Cancer) |
| Divisions: | Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Monograph |
| Depositing User: | MUHAMMAD AKIF AIMAN AB SHUKOR |
| Date Deposited: | 26 Oct 2025 00:05 |
| Last Modified: | 19 Nov 2025 01:37 |
| URI: | http://eprints.usm.my/id/eprint/63068 |
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