Results 251 to 260 of about 132,352,308 (329)
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A Doppler System for Dynamic Vector Velocity Maps
Ultrasound in Medicine and Biology, 2002The aim of the vector Doppler technique is the quantitative reconstruction of a velocity field independently of the ultrasonic probe axis to flow angle. In particular, vector Doppler is interesting for studying vascular pathologies related to complex blood flows.
Lorenzo Capineri, Leonardo Masotti
exaly +4 more sources
Pulse Wave Velocity Measurement with Velocity Vector Imaging
, 2013Pulse-wave velocity (PWV) is typically used for estimating the stiffness of arteries This study was to implement a new method and rapid two-dimensional ultrasound method for the measurement of PWV in the carotid artery. The longitudinal dynamic image of CCA was analyzed using syngo Velocity Vector Imaging technology.
Cun Liu +9 more
semanticscholar +2 more sources
Angular velocity nonlinear observer from vector measurements
at - Automatisierungstechnik, 2015 This paper proposes a technique to estimate the angular velocity of a rigid body from vector measurements. Compared to the approaches presented in the literature, it does not use attitude information nor rate gyros as inputs. Instead, vector measurements
Lionel Magnis, N. Petit
semanticscholar +2 more sources
Introduction to vector velocity imaging
, 2010 Current ultrasound scanners can only estimate the velocity along the ultrasound beam and this gives rise to the cos() factor on all velocity estimates. This is a major limitation as most vessels are close to perpendicular to the beam. Also the angle varies as a function of space and time making it virtually impossible to compensate for the factor and ...
Jensen, Jørgen Arendt; id_orcid 0000-0002-7896-3136 +3 more
openaire +2 more sources
Mounting Parameter Estimation From Velocity Vector Observations for Land Vehicle Navigation
IEEE transactions on industrial electronics (1982. Print), 2021A velocity model composing speed sensors and motion constraints is used as the direct and effective auxiliary information of global navigation satellite system (GNSS)/inertial navigation system integrated systems to improve the land vehicle navigation ...
Quan Zhang +4 more
semanticscholar +1 more source
Real-Time Vector Velocity Assessment Through Multigate Doppler and Plane Waves
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2014Stefano Ricci, Piero Tortoli, Luca Bassi
exaly +2 more sources