AIMC Topic: Blood Flow Velocity

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Hemodynamic study of blood flow in the aorta during the interventional robot treatment using fluid-structure interaction.

Biomechanics and modeling in mechanobiology Jun 17, 2023
An interventional robot is a means for vascular diagnosis and treatment, and it can perform dredging, releasing drug and operating. Normal hemodynamic indicators are a prerequisite for the application of interventional robots. The current hemodynamic...
Computer Simulation Hemodynamics Aorta Models, Cardiovascular Pulsatile Flow Robotics Blood Pressure Blood Flow Velocity
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Deep-learning-assisted and GPU-accelerated vector Doppler imaging with aliasing-resistant velocity estimation.

Ultrasonics May 24, 2023
Vector flow imaging is a diagnostic ultrasound modality that is suited for the visualization of complex blood flow dynamics. One popular way of realizing vector flow imaging at high frame rates over 1000 fps is to apply multi-angle vector Doppler est...
Phantoms, Imaging Deep Learning Ultrasonography, Doppler Carotid Arteries Blood Flow Velocity
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Cerebrovascular super-resolution 4D Flow MRI - Sequential combination of resolution enhancement by deep learning and physics-informed image processing to non-invasively quantify intracranial velocity, flow, and relative pressure.

Medical image analysis Apr 22, 2023
The development of cerebrovascular disease is tightly coupled to regional changes in intracranial flow and relative pressure. Image-based assessment using phase contrast magnetic resonance imaging has particular promise for non-invasive full-field ma...
Imaging, Three-Dimensional Humans Image Processing, Computer-Assisted Hemodynamics Magnetic Resonance Imaging Image Enhancement Deep Learning Blood Flow Velocity
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Artificial intelligence velocimetry reveals in vivo flow rates, pressure gradients, and shear stresses in murine perivascular flows.

Proceedings of the National Academy of Sciences of the United States of America Mar 29, 2023
Quantifying the flow of cerebrospinal fluid (CSF) is crucial for understanding brain waste clearance and nutrient delivery, as well as edema in pathological conditions such as stroke. However, existing in vivo techniques are limited to sparse velocit...
Mice Rheology Blood Flow Velocity Brain Animals Physics Neural Networks, Computer Artificial Intelligence
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Speed-resolved perfusion imaging using multi-exposure laser speckle contrast imaging and machine learning.

Journal of biomedical optics Mar 20, 2023
SIGNIFICANCE: Laser speckle contrast imaging (LSCI) gives a relative measure of microcirculatory perfusion. However, due to the limited information in single-exposure LSCI, models are inaccurate for skin tissue due to complex effects from e.g. static...
Blood Flow Velocity Laser-Doppler Flowmetry Microcirculation Machine Learning Regional Blood Flow Perfusion Imaging Laser Speckle Contrast Imaging
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Super-resolution 4D flow MRI to quantify aortic regurgitation using computational fluid dynamics and deep learning.

The international journal of cardiovascular imaging Feb 23, 2023
Changes in cardiovascular hemodynamics are closely related to the development of aortic regurgitation (AR), a type of valvular heart disease. Metrics derived from blood flows are used to indicate AR onset and evaluate its severity. These metrics can ...
Predictive Value of Tests Aortic Valve Insufficiency Blood Flow Velocity Humans Imaging, Three-Dimensional Hemodynamics Magnetic Resonance Imaging Deep Learning Hydrodynamics
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Segmentation of the aorta in systolic phase from 4D flow MRI: multi-atlas vs. deep learning.

Magma (New York, N.Y.) Feb 17, 2023
OBJECTIVE: In the management of the aortic aneurysm, 4D flow magnetic resonance Imaging provides valuable information for the computation of new biomarkers using computational fluid dynamics (CFD). However, accurate segmentation of the aorta is requi...
Image Processing, Computer-Assisted Magnetic Resonance Imaging Blood Flow Velocity Aorta, Abdominal Humans Deep Learning
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Surgical planning of arteriovenous fistulae in routine clinical practice: A machine learning predictive tool.

The journal of vascular access Feb 10, 2023
BACKGROUND: Arteriovenous fistula (AVF) is the preferred vascular access (VA) for hemodialysis, but it is associated with high non-maturation and failure rates. Predicting patient-specific AVF maturation and postoperative changes in blood flow volume...
Patient-Specific Modeling Retrospective Studies Clinical Decision-Making Female Reproducibility of Results Aged Male Machine Learning Decision Support Techniques Databases, Factual Humans Blood Flow Velocity Arteriovenous Shunt, Surgical Vascular Patency Treatment Outcome Graft Occlusion, Vascular Middle Aged Upper Extremity Predictive Value of Tests Renal Dialysis Models, Cardiovascular Regional Blood Flow Time Factors
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Deep learning-based prediction of intra-cardiac blood flow in long-axis cine magnetic resonance imaging.

The international journal of cardiovascular imaging Feb 10, 2023
PURPOSE: We aimed to design and evaluate a deep learning-based method to automatically predict the time-varying in-plane blood flow velocity within the cardiac cavities in long-axis cine MRI, validated against 4D flow.
Predictive Value of Tests Heart Blood Flow Velocity Magnetic Resonance Imaging, Cine Hemodynamics Deep Learning Magnetic Resonance Imaging Humans
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4D segmentation of the thoracic aorta from 4D flow MRI using deep learning.

Magnetic resonance imaging Jan 5, 2023
BACKGROUND: 4D flow MRI allows the analysis of hemodynamic changes in the aorta caused by pathologies such as thoracic aortic aneurysms (TAA). For personalized management of TAA, new biomarkers are required to analyze the effect of fluid structure it...
Blood Flow Velocity Aorta Magnetic Resonance Imaging, Cine Humans Magnetic Resonance Imaging Deep Learning Aorta, Thoracic Aortic Aneurysm, Thoracic
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