Objective To evaluate common carotid arterialstructure and functionin healthy adults using quality intima-media thickness（QIMT） and quantitative artery stiffness(QAS). Methods 360 subjects were divided into 3 groups based on age: young group(20~39 years)

middle-age group(40~59 years) and aged group(60~79 years)

120 persons in each group. The bilateral common carotids arterial intima-media thickness(IMT) and elasticity coefficient were respectively measured by QIMT and QAS. Distention coefficient (DC)、compliance coefficient(CC)、stiffness parameter(α、β) and pulse wave velocity(PWV) were analyzed. The results of parameters among bilateral carotids

different genders anddifferent ages were compared and discussed. Results ①There were no statistically significant differences in IMT

DC

CC

α

β and PWV between bilateral common carotids groups. ②DC of male group is higher than that of female group

there were statistically significant differences (P<0.05). ③ IMT values increased while DC values decreased from young group to middle-age group and aged group. Compared with young group

CC values decreased whileα

β and PWV values increased in middle-age group and aged group(P<0.05)

but there were no statistical differences between middle-age group and aged group. Conclusions Age and gende could influent structure and function of common carotid artery in healthy adults.