Application of four-low scanning scheme of dual-source CT in triple-rule-out CT angiography for evaluation of acute chest pain / 实用放射学杂志

ABSTRACT

Objective To investigate the feasibility and value of the four-low scanning scheme of dual-source computed tomography(DSCT)on triple-rule-out computed tomography angiography(CTA)examination in acute chest pain.Methods Triple-rule-out CTA examination was performed on 150 patients with prospective electrocardiogram gating.They were divided into two groups:group A(100 kV)and group B(70 kV).According to different body mass index(BMI),group A were divided into Anon-overweight and Aoverweight,while group B were divided into Bnon-overweight and Boverweight.Subjective and objective evaluations[signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR),standard deviation(SD)]of the two groups were analyzed,and radiation-related parameters were recorded.Results There was no significant difference in subjective scores between the two groups(Kappa value=0.372,P＞0.05).CT value,SD,CNR and SNR were significantly different among the four subgroups(P＜0.05).SNR and CNR of A(B)non-overweight were higher than those of A(B)overweight(P＜0.05).Effective dose(ED)of group B decreased by 74.5％.Conclusion ADMIRE-3 and iterative beam-hardening correction(iBHC)combined with four-low scanning scheme of DSCT could improve the images quality of vascular,and reduce the radiation dose,contrast agent dosage and flow rate,which is worthy of promotion and application in patients with BMI≤30 kg/m2 acute chest pain triple-rule-out.