ISSN 1004-4140
CN 11-3017/P
WANG Rui-qiong, FU Xia, DENG Jian-guo, LIU Jian-hua, CAI Li, QUAN Xiang, CHEN Xia, CAO Shen, SUN Jun. Coronary Computed Tomography Angiography Using Low-kV and Tube Current Modulation in Subjects with Normal Body Mass Indices: A Feasibility Study[J]. CT Theory and Applications, 2013, 22(2): 345-352.
Citation: WANG Rui-qiong, FU Xia, DENG Jian-guo, LIU Jian-hua, CAI Li, QUAN Xiang, CHEN Xia, CAO Shen, SUN Jun. Coronary Computed Tomography Angiography Using Low-kV and Tube Current Modulation in Subjects with Normal Body Mass Indices: A Feasibility Study[J]. CT Theory and Applications, 2013, 22(2): 345-352.

Coronary Computed Tomography Angiography Using Low-kV and Tube Current Modulation in Subjects with Normal Body Mass Indices: A Feasibility Study

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  • Received Date: December 26, 2012
  • Available Online: December 12, 2022
  • Objectlve: To assess the image quality and radiation dose of 80 kV electrocardiography(ECG)-gated CCTA in subjects with a normal body mass index(BMI),compared to 120 kV ECG-gated CCTA.Method: The CCTA images of 140 subjects with BMIs < 25 kg/m2 were analyzed.Seventy subjects underwent 120 kV CCTA,and the other 70 subjects underwent 80kV CCTA.Two blinded observers independently evaluated the subjective image quality of the coronary arteries.The objective image quality(signal-to-noise ratio(SNR) and contrast-to-noise ratio(CNR)) and radiation dose were also measured in each group.Results: Although the objective image quality of the 80 kV protocol images was significantly poorer than that of 120 kV protocol images(P < 0.05),there was no significant difference in the subjective image quality between the two groups(P > 0.05).The radiation dose was reduced by 12mSv with the 80 kV protocol and by 82% with the 80 kV and ECG-based tube current modulation than one with the 120 kV protocol(P < 0.05).Conclusion: The low tube voltage CCTA protocol using 80 kV allows significant reduction of the radiation dose without impairing the subjective image quality in subjects with normal BMIs.
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