Evolution of Radiation Dose from Cardiac CT
The introduction of protocol developments and software modifications for cardiac computed tomography (CT) imaging such as automatic tube current modulation, optimized tube potential selection, electrocardiography (ECG) pulsing, and iterative reconstruction algorithms enabled a considerable decrease of ionizing radiation dose of cardiac CT examinations. In parallel, submillimeter spatial resolution and high temporal resolution for motion-free imaging of the small anatomic structures of the heart were achieved. Efforts must be made for choosing the best combination of all available techniques for radiation dose reduction for optimizing and minimizing the radiation exposure to each patient undergoing cardiac CT.
KeywordsCardiac CT angiography (CCTA) Radiation dose ECG gating Automated exposure control Tube voltage Iterative reconstruction Radiation risks
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- 8.Menke J, Unterberg-Buchwald C, Staab W, Sohns JM, Seif Amir Hosseini A, Schwarz A. Head-to-head comparison of prospectively triggered vs retrospectively gated coronary computed tomography angiography: meta-analysis of diagnostic accuracy, image quality, and radiation dose. Am Heart J. 2013;165(2):154–63. e3.CrossRefGoogle Scholar
- 14.Park YJ, Kim YJ, Lee JW, Kim HY, Hong YJ, Lee HJ, et al. Automatic Tube Potential Selection with Tube Current Modulation (APSCM) in coronary CT angiography: comparison of image quality and radiation dose with conventional body mass index-based protocol. J Cardiovasc Comput Tomogr. 2012;6(3):184–90.CrossRefGoogle Scholar
- 16.Hell MM, Bittner D, Schuhbaeck A, Muschiol G, Brand M, Lell M, et al. Prospectively ECG-triggered high-pitch coronary angiography with third-generation dual-source CT at 70 kVp tube voltage: feasibility, image quality, radiation dose, and effect of iterative reconstruction. J Cardiovasc Comput Tomogr. 2014;8(6):418–25.CrossRefGoogle Scholar