1.Assessment of motion dynamic characteristics of common carotid artery wall in normal people with velocity vector imaging
Bing BAI ; Baozhen ZHAO ; Zhuhong CAI ; Wenfeng XIONG ; Yin WANG
Chinese Journal of Medical Imaging Technology 2010;26(4):666-670
Objective To analyze the motion, elastic and derived parameters of normal common carotid artery (CCA) wall in short-axis orientation with velocity vector imaging (VVI) technique. Methods Two-dimensional dynamic images of CCA in 40 healthy volunteers people were obtained in short-axis view with Siemens Acuson Sequoia 512 color Doppler ultrasound. The motion, elastic and derived parameters were analyzed in right CCA including 6 segments: Anterior wall, posterior wall, anterolateral wall, anterior internal wall, posterolateral wall and posterointernal wall. Relationship between these parameters and the influencing factors were analyzed as well. Results There was no statistical difference of the elastic parameters among 6 walls (P>0.05). Some of the motion parameters of the lateral wall and anterior wall were higher than those of the posterior wall and internal wall (P<0.05). Age and intima-media thickness were negatively correlated with some elastic parameters and some motion parameters (P<0.05). Heart rate were positively correlated with some elastic parameters and some motion parameters (P<0.05). Elastic parameters were positively correlated with motion parameters (P<0.05) and positive correlation was found between time to peak of elastic and motion parameters (P<0.05). Conclusion VVI is an effective technique for observing CCA mechanical characteristics of the movement in normal human, and has potential for studying some of related factors of the characteristics.
2.Quantitative analysis of intraluminal thrombus in abdominal aortic aneurysm with ultrasound integrated backscatter technique
Qun XIN ; Zhuhong CAI ; Liang WANG ; Junmin BAO ; Zaiping JING ; Zhijun MEI ; Baozhen ZHAO
Chinese Journal of Interventional Imaging and Therapy 2009;6(6):571-574
Objective To investigate the value of ultrasound integrated backscatter (IBS) in quantitative analysis of in-traluminal thrombus in abdominal aortic aneurysm (AAA).Methods IBS of intraluminal thrombus in 29 patients were measured,including All (average image intensity) and SDI (standard deviation of image intensity).Meanwhile,different echoes and characteristics of IBS in thrombus were compared and pathologic analysis was performed.Results ①Individual All value of homogenous thrombus differed remarkably,SDI value was low.There was no significant difference about All in homogeneous group and adjacent cavity group (P>0.05).All and SDI value in adjacent wall group were higher than those in other groups (P<0.01).②According to pathologic analysis,cellulose contents were abundant in adjacent wall group,but fewer in adjacent cavity group and homogeneous group.Conclusion IBS might be regarded as a sensitive and specific method and a quantitative basis for estimating and predicting the rupture risk of AAA.
3.Three-dimensional speckle tracking imaging for quantitative evaluation of left ventricular global strain in renal transplant recipients
Junyi TANG ; Mingxing SUI ; Jiaying XI ; Xialing ZHU ; Zhuhong CAI ; Xiucai JIN
Organ Transplantation 2021;12(4):458-
Objective To evaluate the application value of three-dimensional speckle tracking imaging (3D-STI) in quantitatively evaluating the left ventricular global strain in recipients within 3 months after renal transplantation. Methods Clinical data including blood pressure, serum creatinine and tacrolimus blood concentration of 34 renal transplant recipients were collected before operation, 7 d, 1 month and 3 months after operation, respectively. Meanwhile, conventional echocardiography and 3D-STI examination were performed. Echocardiographic parameters [left ventricular end-diastolic volume (LVEDV), left ventricular end-systolic volume (LVESV) and left ventricular ejection fraction (LVEF)] and 3D-STI parameters [left ventricular global peak longitudinal strain (GPLS), global peak circumferential strain (GPCS), global peak radial strain (GPRS) and global peak area strain (GPAS)] of recipients were collected. The changes of these parameters before operation, 7 d, 1 month and 3 months after operation were statistically compared. The changing characteristic and application value of 3D-STI in quantitatively evaluating the left ventricular global strain in recipients within 3 months after renal transplantation were evaluated. Results LVEF and GPCS did not significantly differ at different time points (all