Objective:To explore the value of ultrasound radio-frequency(RF) data technique in assessing carotid artery elasticity in patients with impaired glucose tolerance. Methods:In this study,58 objects in IGT group and 39 objects in the control group were included. All patients received ultrasound RF-data technique examination on the carotid artery. The following elastic parameters:intima-media thickness(IMT),vascular expansibility(e),compliance coefficient(CC),stiffness parameter(β),pulse wave velocity(PWV) were obtained. The correlation of them and the differences among the parameters were analyzed. Results:①Compared with normal control group,BMI,2-hPG,TC,TG of IGT group were significantly higher in IGT group(P < 0.05);② IMT,-茁,PWV of IGT group were significantly higher,e,CC were significantly lower in IGT group(P < 0.05);③ In the IGT group,through Pearson correlation analysis,IMT was correlated positively with PWV,age and β(r = 0.290~0.661,all P < 0.05),and PWV was correlated positively with age,IMT and β(r = 0.441~0.933,all P < 0.05). IMT and PWV were correlated negatively with e,CC(P < 0.05). Conclusion:Ultrasound radio-frequency(RF) data technique can evaluate carotid artery elasticity in patients with impaired glucose tolerance,and it should be indicators in the diagnosis of early atherosclerosis.