Avansert blodstrømsavbildning: Vector flow imaging
نویسندگان
چکیده
منابع مشابه
High-frame rate vector flow imaging of the carotid bifurcation
Carotid artery atherosclerotic disease is still a significant cause of cerebrovascular morbidity and mortality. A new angle-independent technique, measuring and visualizing blood flow velocities in all directions, called vector flow imaging (VFI) is becoming available from several vendors. VFI can provide more intuitive and quantitative imaging of vortex formation, which is not clearly distingu...
متن کاملIntraoperative cardiac ultrasound examination using vector flow imaging.
Conventional ultrasound (US) methods for blood velocity estimation only provide one-dimensional and angle-dependent velocity estimates; thus, the complexity of cardiac flow has been difficult to measure. To circumvent these limitations, the Transverse Oscillation (TO) vector flow method has been proposed. The vector flow method implemented on a commercial scanner provided real-time, angle-indep...
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The aim of this study was prospectively to monitor the volume flow in patients with arteriovenous fistula (AVF) with the angle independent ultrasound technique Vector Flow Imaging (VFI). Volume flow values were compared with Ultrasound dilution technique (UDT). Hemodialysis patients need a well-functioning vascular access with as few complications as possible and preferred vascular access is an...
متن کاملUltrasound Vector Flow Imaging-Part II: Parallel Systems.
This paper gives a review of the current state-of-the-art in ultrasound parallel acquisition systems for flow imaging using spherical and plane waves emissions. The imaging methods are explained along with the advantages of using these very fast and sensitive velocity estimators. These experimental systems are capable of acquiring thousands of images per second for fast moving flow as well as y...
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This paper considers the problem of predicting the number, length and distribution of traffic flows some time into the future, based upon packets collected in the present. Three methods– the standard Expectation-Maximization algorithm, a distributed version of the Expectation-Maximization algorithm, and a Particle Filter– are used to predict the mean flow length and complete flow distributions ...
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ژورنال
عنوان ژورنال: Ultraschall in Der Medizin
سال: 2021
ISSN: ['0172-4614', '1438-8782']
DOI: https://doi.org/10.1055/a-1652-7767