Comparison of Image Quality and Radiation Dose between CT High-Pitch Turbo Flash and Retrospective Electrocardiogated Scanning Mode in Coronary Artery Imaging
Objective To compare the image quality and effective radiation dose of the third-generation dual-source Force CT coronary angiography(CTCA)with Turbo Flash and retrospective ECG-gated mode.Methods A total of 136 patients receiving CTCA examination from January to March 2023 were randomly assigned to large pitch Turbo Flash P group and retrospective electrocardiogated scan R group,the patients were divided into P1 group and R1 group according to heart rate＜65 beats/min,heart rate＞65 times/min were divided into P2 group and R2 group.The image quality of coronary artery was subjectively scored,and the dose length product(DLP)and effective radiation dose(ED)were compared.Results 95.36％in group P and 95.72％in group R met the image quality requirements.There was no significant difference between the two groups(P＞0.05).There were no significant differences in age,BIM,heart rate,heart rate variation,DLP and ED between P group and R group(P＜0.05).The DLP and ED were 4.100(34.8,52.32)mGy·cm and 0.617(0.5,0.7)mSv in group P and 425.500(365.0,489.1)mGy·cm and 5.957(5.0,6.8)mSv in group R,respectively.The differences were statistically significant(P＜0.05).There were significant differences in image quality score of right coronary artery,overall score of P1 and P2,P2 and R2(P＜0.05).There was no significant difference in the remaining coronary artery segments(P＞05).Conclusion Force CT high-pitch Turbo Flash scanning mode has high success rate,good image quality,and low effective radiation dose,which can be used as the first choice for patients with low heart rate.Coronary artery images obtained from patients with high heart rate can meet the diagnostic requirements.
Coronary Angiographyimage QualityRadiation DosageThird-generation Dual-source Force CTHigh-Pitch Mode
NETL
NSTL
万方数据
