The establishment of typical dose and assessment of scanning parameters influencing radiation dose in cardiac computed tomography (CT) imaging

Solehuddin, Nur Syahira (2025) The establishment of typical dose and assessment of scanning parameters influencing radiation dose in cardiac computed tomography (CT) imaging. Project Report. Universiti Sains Malaysia. (Submitted)

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Abstract

Cardiac computed tomography (CT) is widely used for detecting coronary artery disease but involves relatively high radiation doses, necessitating optimisation. This study aimed to determine typical dose levels and assess scanning parameter influencing dose variation in cardiac CT at HPUSM. A total of 200 cases were retrospectively reviewed from Siemens SOMATOM Definition AS+ and Philips Incisive CT scanners. Demographic and technical data, including mAs, exposure time, scan length, CTDI vol, and DLP, were extracted from PACS and VIARAD5. Microsoft Excel 2021 was used to analyse the relationship between scan parameters and dose. CorCTAAdapt (Siemens) showed the lowest dose, while CTA Coronary (Philips) had the highest. Positive correlations were found between mAs, exposure time, and scan length with CTDIvol and DLP. The 50th percentile defined the typical dose; the 75th established local diagnostic reference levels (LDRLs). Typical doses were 17.39 mGy/233.00 mGy·cm (CorCTA), 16.87 mGy/168.50 mGy·cm (CorCTAAdapt), and 48.97 mGy/861.90 mGy·cm (CTA Coronary). This study established typical dose values and identified key scanning parameters that influence dose in cardiac CT imaging. The findings offer important local reference data for dose optimisation and support the development of safer, standardised imaging protocols at HPUSM.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Cardiac CT, Typical Dose, computed tomography (CT) imaging
Subjects: R Medicine
R Medicine > RC Internal medicine > RC71-78.7 Examination. Diagnosis Including raiography
Divisions: Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Kesihatan (School of Health Sciences) > Monograph
Depositing User: MUHAMMAD AKIF AIMAN AB SHUKOR
Date Deposited: 22 Oct 2025 23:45
Last Modified: 19 Nov 2025 08:12
URI: http://eprints.usm.my/id/eprint/63042

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