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Radiation dose associated with coronary CT angiography and invasive coronary angiography: An experimental study of the effect of dose-saving strategies

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Open access
Authors
Sabarudin, A.
Sun, Zhonghua
Ng, K.
Date
2012
Type
Journal Article

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Sabarudin, Akmal and Sun, Zhonghua and Ng, Kwan-Hoong. 2012. Radiation dose associated with coronary CT angiography and invasive coronary angiography: An experimental study of the effect of dose-saving strategies. Radiation Protection Dosimetry. 150 (2): pp. 180-187.
Source Title
Radiation protection dosimetry
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This is a pre-copyedited, author-produced PDF of an article accepted for publication in Radiation Protection Dosimetry following peer review. The version of record (cited above) is available online at: http://dx.doi.org/10.1093/rpd/ncr377

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Abstract

This study was conducted on a human anthropomorphic phantom to investigate the effective dose and entrance skin dose (ESD) in selected radiosensitive organs through invasive and computed tomography (CT) coronary angiography procedures using different dose-saving techniques. The effective dose was calculated as 2.49, 3.35 and 9.62 mSv, respectively, corresponding to three coronary CT angiography protocols, including prospective ECG gating and retrospective ECG gating with and without tube current modulation. In comparison, the effective dose was calculated as 7.26, 6.35, 5.58 and 4.71 mSv at four different magnifications acquired with invasive coronary angiography. The highest ESD was measured in the breast during the coronary CT angiography and in the thyroid gland during invasive coronary angiography. Although invasive coronary angiography produces lower radiation dose than coronary CT angiography, application of modified techniques in both CT and invasive coronary angiography is recommended in clinical practice for radiation dose reduction.