Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Impurity accumulation, which decreases the accuracy of flow measurement, is a critical problem when applying Z-shaped or U-shaped ultrasonic flow meters on straight PFA tubes. It can be expected that the guided wave can be used to implement flow measurement on straight PFA tubes. In this paper, the propagation of guided wave is explained by finite element simulations for the flow meter design. Conditions of guided wave generation, including the excitation frequency and the wedge structure, are studied in the simulations. The wedge is designed as a cone which is friendly to be manufactured and installed. The cone angle, the piezoelectric wafer's resonant frequency and the vibration directions are studied in the simulations. The simulations shows that the propagation of guided wave in thin PFA tubes is influenced by the piezoelectric wafers' resonant frequency and the vibration direction when the mode is on the 'water line'. Based on the results of the simulations, an experiment is conducted to verify the principles of excitation conditions, which performs flow measurement on a straight PFA tube well.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ultras.2016.08.003 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cardiovascular Assessments in Children and Adolescents With Hypertension.
Rev Cardiovasc Med
August 2025
Department of Nephrology, Akron Nephrology Associates at Cleveland Clinic Akron General Medical Center, Akron, OH 44302, USA.
Cardiovascular assessments in children and adolescents with hypertension are essential for detecting early signs of organ damage and guiding timely interventions. The pathophysiology of pediatric hypertension involves a complex interplay of arterial stiffness, endothelial dysfunction, metabolic disturbances, activation of the renin-angiotensin-aldosterone system, and immune dysregulation. These mechanisms collectively contribute to target organ damage, particularly in the cardiovascular system.
View Article and Find Full Text PDFWave Speed Mapping as a Complementary Tool for Identifying Ventricular Tachycardia Substrate.
J Cardiovasc Electrophysiol
September 2025
Department of Cardiology, Stefan Cardinal Wyszynski Province Specialist Hospital, Lublin, Poland.
Introduction: Wave speed (WS) mapping, enabled by omnipolar technology, allows for real-time visualization of local conduction velocity (CV). Its utility in ventricular tachycardia (VT) ablation has not been fully characterized.
Methods And Results: We describe a case series of patients undergoing VT ablation in which WS mapping was applied alongside established techniques such as peak frequency (PF) mapping and isochronal late activation mapping (ILAM).
Quantum Information Theory on Sparse Wave Functions and Applications for Quantum Chemistry.
J Phys Chem A
September 2025
Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Coppito, L'Aquila 67100, Italy.
In recent years Quantum Computing prominently entered in the field of Computational Chemistry, importing and transforming computational methods and ideas originally developed within other disciplines, such as Physics, Mathematics and Computer Science into algorithms able to estimate quantum properties of atoms and molecules on present and future quantum devices. An important role in this contamination process is attributed to Quantum Information techniques, having the 2-fold role of contributing to the analysis of electron correlation and entanglements and guiding the construction of wave function variational ansatzes for the Variational Quantum Eigensolver technique. This paper introduces the tool SparQ (Sparse Quantum state analysis), designed to efficiently compute fundamental quantum information theory observables on post-Hartree-Fock wave functions sparse in their definition space.
View Article and Find Full Text PDFAssociation of cardiovascular risks and carotid stiffening at ultrafast ultrasound imaging in young populations.
Eur Radiol
September 2025
Department of Ultrasound, Affiliated Hospital of Nanjing University of Chinese Medicine, Jiangsu Province Hospital of Chinese Medicine, Nanjing, China.
Objectives: To evaluate the predictive role of carotid stiffening, quantified using ultrafast pulse wave velocity (ufPWV), for assessing cardiovascular risk in young populations with no or elevated cardiovascular risk factors (CVRFs).
Materials And Methods: This study enrolled 180 young, apparently healthy individuals who underwent ufPWV measurements. They were classified into three groups: the CVRF-free group (n = 60), comprising current non-smokers with untreated blood pressure < 140/90 mmHg, fasting blood glucose (FBG) < 7.
Impact of Epicardial plaQUe Composition and geomeTry on Coronary hEmodynamics and Flow in Patients With Coronary Artery Disease (iEquate).
Catheter Cardiovasc Interv
September 2025
Royal North Shore Hospital, St Leonards, Australia.
Background: Invasive coronary physiology including fractional flow reserve (FFR), instantaneous wave-free ratio (iFR), and coronary flow reserve (CFR) are guideline-endorsed tools to guide the management of coronary artery disease (CAD). Complex factors impact and confound these assessments, and discordance between modalities complicates clinical management. iEquate is a prospective observational trial that combines multi-modality coronary physiology and optical coherence tomography (OCT) to identify the determinants of pressure-wire derived myocardial ischemia and iFR-FFR discordance.
View Article and Find Full Text PDF