A comparison study of radiation effective dose in ECG-Gated Coronary CT Angiography and calcium scoring examinations performed with a dual-source CT scanner

Akmal Sabarudin, Tiong Wei Siong, Ang Wee Chin, Ng Kwan Hoong, Muhammad Khalis Abdul Karim

Research output: Contribution to journalArticle

Abstract

In this report we have evaluated radiation effective dose received by patients during ECG-gated CCTA examinations based on gender, heart rate, tube voltage protocol and body mass index (BMI). A total of 1,824 patients were retrospectively recruited (1,139 men and 685 women) and they were divided into Group 1 (CCTA with calcium scoring), Group 2 (CCTA without calcium scoring) and Group 3 (only calcium scoring), where the association between gender, heart rate, tube voltage protocol and body mass index (BMI) were analysed. Examinations were performed using a retrospective ECG-gated CCTA protocol and the effective doses were calculated from the dose length product with a conversion coefficient of 0.026 mSv.mGy −1 cm −1 . No significant differences were observed in the mean effective dose between gender in all groups. The mean estimated dose was significantly higher when the heart rate was lower in Group 1 (p < 0.001) and Group 2 (p = 0.002). There were also significant differences between the mean effective dose in tube voltage protocol and BMI among the three groups. The mean effective dose was positively correlated with BMI (p < 0.001), but inversely related to the heart rate. This study supported the theory that a high heart rate, low tube voltage and low BMI could significantly reduce radiation dose exposure.

Original languageEnglish
Article number4374
JournalScientific Reports
Volume9
Issue number1
DOIs
Publication statusPublished - 1 Dec 2019

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Coronary Angiography
Electrocardiography
Body Mass Index
Heart Rate
Radiation
Calcium
Computed Tomography Angiography

ASJC Scopus subject areas

  • General

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A comparison study of radiation effective dose in ECG-Gated Coronary CT Angiography and calcium scoring examinations performed with a dual-source CT scanner. / Sabarudin, Akmal; Siong, Tiong Wei; Chin, Ang Wee; Hoong, Ng Kwan; Karim, Muhammad Khalis Abdul.

In: Scientific Reports, Vol. 9, No. 1, 4374, 01.12.2019.

Research output: Contribution to journalArticle

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