title: Radiation dose in coronary CT angiography associated with prospective ECG-triggering technique: comparisons with different CT generations.
abstract: A retrospective analysis was performed in patients undergoing prospective ECG-triggered coronary computed tomography (CT) angiography (CCTA) with the single-source 64-slice CT (SSCT), dual-source 64-slice CT (DSCT), dual-source 128-slice CT and 320-slice CT with the aim of comparing the radiation dose associated with different CT generations. A total of 164 patients undergoing prospective ECG-triggered CCTA with different types of CT scanners were studied with the mean effective doses estimated at 6.8 ± 3.2, 4.2 ± 1.9, 4.1±0.6 and 3.8 ± 1.4 mSv corresponding to the 128-slice DSCT, 64-slice DSCT, 64-slice SSCT and 320-slice CT scanners. In this study a positive relationship was found between the effective dose and the body mass index (BMI). A low radiation dose is achieved in prospective ECG-triggered CCTA, regardless of the CT scanner generation. BMI is identified as the major factor that has a direct impact on the effective dose associated with prospective ECG-triggered CCTA.
authors.affiliation: Discipline of Medical Imaging, Department of Imaging and Applied Physics, Curtin University, GPO Box, U1987, Perth, Western Australia 6845, Australia.
authors.forename: Akmal
authors.initials: A
authors.lastname: Sabarudin
authors.forename: Zhonghua
authors.initials: Z
authors.lastname: Sun
authors.forename: Kwan-Hoong
authors.initials: KH
authors.lastname: Ng
mesh_terms: D001315:Australia / Q000453:epidemiology; D001822:Body Burden; D015992:Body Mass Index; D055424:Cardiac-Gated Imaging Techniques; D017023:Coronary Angiography / Q000145:classification / Q000706:statistics & numerical data*; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008296:Malaysia / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011829:Radiation Dosage; D011874:Radiometry / Q000706:statistics & numerical data; D018570:Risk Assessment; D014057:Tomography, X-Ray Computed / Q000145:classification / Q000706:statistics & numerical data*