CARE kV combined with CARE Dose 4Dtechniques for decreasing radiation dose of chest CT scanning in adult

Objective To explore the value of CARE kV combined with CARE Dose 4Dtechniques in decreasing radiation dose of adult chest CT scanning.Methods Totally 114patients underwent chest CT scanning were divided into two groups randomly.Patients in group A(n=50) underwent chest CT scanning with CARE kV combined CARE Dose 4Dtechniques,while in group B(n=64) underwent chest CT scanning with CARE Dose 4Dtechnique.The imaging quality(mean CT value,noise,SNR,CNR,scores and so on) and radiation dose between the two groups were compared,respectively.Results Compared with group B,the average volume CT dose index(CTDIvol) in group A decreased by 30.29%,dose length product(DLP) decreased by 30.41%,and effective dose(ED) decreased by 30.36%(all P0.05).The image noise in group A was higher than that in group B.SNR,CNR,mean CT values,enhanced CT value in ascending aorta,pulmonary artery and muscles trunk were not statistically different between the two groups(all P0.05),except SNR on the muscles trunk in group B was higher than that in group A(P0.05).The scores of image quality were all over 4.5,and the difference of lesion detection rate had no statistically significant between the two groups(all P0.05).Conclusion In chest CT scanning,CARE kV combined with CARE Dose 4Dtechniques not only promises high quality images,but also decreases radiation dose.