Objective To investigate the effects of pulsed electrocardiography(ECG)gated and Force CT 70 kV prospective large-pitch coronary artery imaging on radiation dose and image quality.Methods Data of 49 patients who underwent 256-slice iCT 100 kV pulsed ECG-gated coronary CT angiography(CCTA)and 37 patients who underwent Force CT 70 kV prospective high-pitch CCTA were collected in the First Affiliated Hospital of Baotou Medical College from January 2022 to January 2023,Inner Mongolia University of Science and Technology.They were recorded as group A and group B,with a total of 86 cases.The heart rate,CT value of each segment of coronary artery,signal-to-noise ratio,contrast-to-noise ratio and radiation dose of the two groups were compared.Results There were significant differences in heart rate,CT value of coronary artery,signal-to-noise ratio,contrast-to-noise ratio and radiation dose between the two groups(P<0.05).Conclusion Force CT 70 kV prospective large-pitch coronary artery imaging has lower requirements on heart rate than pulse ECG gated coronary artery imaging under 100 kV tube voltage,and the radiation dose can be significantly reduced under 70 kV tube voltage,while the image quality can still meet the diagnostic requirements.
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