PurposeTo explore the value of ultrasound radio frequency technique in the quantitative evaluation of common carotid artery intima-media thickness (IMT) and elasticity change in patients with dyslipidemia, and to discuss the influence of high density lipoprotein cholesterol (HDL-C) upon carotid artery structure and elasticity function. Materials and Methods A hundred and fifty patients with abnormal serum lipid were selected as case group and further divided into three groups: group A--50 patients with hyperlipidemia and high HDL-C, group B--50 patients with hyperlipidemia and normal HDL-C, group C--50 patients with hyperlipidemia and low HDL-C. Meanwhile, 50 healthy people were enrolled in the study as control group (group D). The ultrasound radio frequency-data technique was employed to analyze the influence of hyperlipidemia and HDL-C upon IMT, CC,β, PWV and AIx.Results The IMT,β, PWV and AIx in group B were higher than those in group D, but group B had lower CC (the differences with statistic significance,t=5.141, 4.219, 4.898, 4.142 and-3.758,P<0.01). Compared with group A, group B had higher IMT,β, PWV and AIx and lower CC (the differences with statistic significance,t=3.425, 2.807, 2.913, 2.209 and-2.091,P<0.05 orP<0.01). Compared with group B, group C had higher IMT,β, PWV and AIx and lower CC (the differences with statistic significance,t=4.937, 2.195, 3.337, 2.067 and-3.049, P<0.05 orP<0.01). Group A had higher IMT and PWV than group D (the differences with statistic significance,t=2.236 and 2.407,P<0.05), but CC,β, and AIx showed no difference between group A and group D (t=-1.693, 1.845 and 1.967,P>0.05). In patients with hyperlipidemia, the increase of HDL-C led to the reduction of the common carotid artery IMT and wall stiffness and the increase of elasticity and vice versa.Conclusion The ultrasound radio frequency technique could measure the real-time common carotid artery IMT and elasticity automatically and accurately, thus provides reliable quantitative index for the evaluation of early artery structure and change of function in lipid lowering therapy.

Thyroid nodules are extremely common. Ultrasonography is the most effective imaging modality to diagnose and differentiate thyroid nodules. There are many versions of thyroid image reporting and data system(TI-RADS) evaluated by ultrasound, but some classification system indexes are complicated and clinical application is chaotic. In 2017, the American College of Radiology (ACR) published white papers that introduced a TI-RADS classification system based on conventional ultrasound to reduce the dependence on operators and facilitate communication with physicians. The purpose of the ACR TI-RADS is to establish the risk classification system for managing thyroid nodules and guide the physicians to make professional judgments. The ACR TI-RADS risk classification system is interpreted in this article, including the development, overview and feature categories of ACR TI-RADS, and authors′ experiences in clinical application.