Objective: To evaluate the forearm arteriovenous fistula stenosis in hemodialysis patients using 3D B-Flow imaging technique. Methods: GE E8 ultrasound diagnostic unit was used to three dimensionally reconstruct the image of stenosis segments in 45 hemodialysis patients by executing CT angiography (CTA) confirmed forearm fistula stenosis, 3D color Doppler flow imaging (CDFI), 3D power Doppler (...

PURPOSE Three-dimensional (3D) magnetic resonance phase contrast imaging (PC-MRI) allows non-invasive diagnosis of pulmonary hypertension (PH) and estimation of elevated mean pulmonary arterial pressure (mPAP) based on vortical motion of blood in the main pulmonary artery. The purpose of the present study was to compare the presence and duration of PH-associated vortices derived from different ...

For a cut ter suction dredger, exploring slurry formation mechanism plays an important role for improving the dredger’s efficiency and performance. In order to optimize the dredger’s working parameters, the flow field is simulated for the cutter head of a cutter suction dredger in this study. First, Cutter’s 3D model is const ructed by 3D Modeling software after necessary parameters are collect...

A building design of vertical axis wind turbines (VAWT) was presented in the article. The construction and operating principle of a wind turbine were described therein. Two VAWT turbine models were compared, i.a. Darrieus and Lenz2, taking their strengths and weaknesses into consideration. 3D solid models of turbine components were presented with the use of SolidWorks software. Using CFD method...

The effect of pore morphology on fluid flow through track-etched polycarbonate membrane was studied numerically by using the fluid flow software FLUENT. The model of membrane structure is a 3D bi-periodic porous surface with circular holes of finite thickness. Both of the effects of constriction and expansion of inner pore geometries on fluid flow are taken into consideration in numerical calcu...