Proceedings ArticleDOI
A new velocimetry algorithm for optimizing ultrasonic PIV imaging method
Jing Wang,Hairong Zheng +1 more
- pp 164-166
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TLDR
This work optimize the velocimetry algorithm which is used for processing images and generating vectors, to improve the accuracy of the vectors and reduce computational cost of the algorithm.Abstract:
Non-invasive measurement of the multiple velocity component of blood flow would be extremely useful for hemodynamic diagnosis of many cardiovascular problems such as athermoma, intimal hyperplasia, thrombus, and hemolysis. In recent years, Zheng et al. have developed a new ultrasound based velocimetry technique, termed echo particle image velocimetry (echo PIV) to measure the multiple velocity components. Based on the technique, we had optimize the velocimetry algorithm which is used for processing images and generating vectors, to improve the accuracy of the vectors and reduce computational cost of the algorithm.read more
Citations
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Journal ArticleDOI
Screening for subclinical atherosclerosis by noninvasive methods in asymptomatic patients with risk factors
Xavier Castellon,Vera Bogdanova +1 more
TL;DR: Screening for subclinical atherosclerosis is justified in asymptomatic patients with cardiovascular risk factors (hypertension, diabetes, obesity, dyslipidemia, and tobacco smoking) and allows us to assess the susceptibility of patients with risk factors and ensures better monitoring of Atherosclerosis, thus reducing the occurrence of cardiovascular events in the long term.
Journal ArticleDOI
Applications of ultrasound imaging system for measuring water-sand parameters during sediment transport process in hydraulic model experiments
Xianjian Zou,Xianjian Zou,Chuanying Wang,Huan Song,Huan Song,Zengqiang Han,Zhimin Ma,Weinbin Hu +7 more
TL;DR: In this article, a B-mode ultrasound imaging system was used to measure the suspended sediment concentration (SSC), underwater topographic riverbed, flow velocity and sediment incipient motion, conducted at a water channel.
The Role of Noninvasive Imaging for Detection High Risk Patients with Subclinical Atherosclerosis
TL;DR: Non-invasive imaging is widely used to assess vascular dysfunction, including measurement of flow-mediated vasodilatation of the brachial artery (FMD), pulse wave velocity (PWV), the augmentation index (AI), and central blood pressure.
References
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Journal Article
Hemodynamics and atherosclerosis. Insights and perspectives gained from studies of human arteries.
TL;DR: Development of clinical techniques for relating hemodynamic and tensile properties to plaque location, stenosis, and composition should permit pathologists to provide new insights into the bases for the topographic and individual differences in plaque progression and outcome.
Journal ArticleDOI
Development and validation of echo PIV
TL;DR: In this paper, the combination of ultrasound echo images with digital particle image velocimetry (DPIV) methods has resulted in a two-dimensional, two-component velocity field measurement technique appropriate for opaque flow conditions including blood flow in clinical applications.
Journal ArticleDOI
Wall Shear Stress Is Associated With Intima-Media Thickness and Carotid Atherosclerosis in Subjects at Low Coronary Heart Disease Risk
Concetta Irace,Claudio Cortese,Elio Fiaschi,Claudio Carallo,Eduardo Farinaro,Agostino Gnasso +5 more
TL;DR: In subjects traditionally considered at low CHD risk, intima-media thickening and carotid atherosclerosis are significantly associated with low wall shear stress, and in subjects at high CHDrisk, the contribution of wallShear stress seems to be masked, and age becomes the only factor significantly associated.
Journal ArticleDOI
Noninvasive Measurement of Steady and Pulsating Velocity Profiles and Shear Rates in Arteries Using Echo PIV: In Vitro Validation Studies
TL;DR: Echo PIV is a promising technique for noninvasive measurement of velocity profiles and shear stress in arteries and it is indicated that error in shear from echo PIV was an order of magnitude less than error from current shear measurement methods.