Evaluation of fetal thymus size with thymic-thoracic ratio and clinical significance / 中国医学影像技术

Objective To explore value of detecting fetal thymus size with the thymic-thoracic ratio (TT-ratio).Methods Prenatal ultrasonography examinations were performed on totally 317 normal singleton healthy pregnancies from 18 to 39 gestational weeks.The normal thymus of fetus were observed on the three-vessel-trachea (3VT) view.The anteroposterior diameter of the thymus (T1) was measured between the anterior border of the aortic arch and posterior border of sternum.The intrathoracic mediastinal diameter (T2) was measured between the anterior border of thoracic vertebral body and posterior border of sternum.The TT-ratio was then calculated as the ratio of T1 to T2.Scatter plot between TT-ratio and gestational age was drawn.And the Spearman regression analysis was performed.Results The thymus of fetus was shown as an irregular homogenous structure in the anterior mediastinum on the 3VT view.The mean TT-ratio was 0.45± 0.03.There was no correlation between TT-ratio and gestation (rs =0.06,P=0.29).Conclusion Prenatal ultrasound can display the thymus obviously.TT-ratio could be applied to assess the fetal thymus size,which can provides clinical basis for the detection of absent or hypoplastic thymus in fetus.

Inlfuence of High Density Lipoprotein Cholesterol Upon Carotid Artery Structure and Elasticity：Assessed with Ultrasound Radio Frequency-data Technique / 中国医学影像学杂志

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,P0.05). 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.

Effect of Therapy of Dispelling Phlegm and Resolving Blood Stasis on Cardiac Muscle Cell Apoptosis in Hypertension Rats with Left Ventricular Hypertrophy / 广州中医药大学学报

0.05).Left ventricular mass index and the apoptotic rate of cardiac muscle cells were decreased in low-and high-dose herbal medicine groups(P