Related Experiment Video
Updated: Jun 16, 2026
12:26
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
[Microcirculation stream modeling: hydromechanic and acoustic models]
Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
|February 23, 2010
Summary
Mathematical modeling of ultrasonic scanning aims to differentiate blood cells like erythrocytes and leucocytes in Doppler images. Complex analysis of signal amplitude and frequency is needed for accurate ultrasonic blood cell differentiation.
Area of Science:
- Biomedical Engineering
- Acoustics
- Medical Imaging
Background:
- Distinguishing between erythrocytes and leucocytes in tissue sections using ultrasound is challenging.
- Doppler imaging displays signals from blood cells, but differentiation requires advanced analysis.
Purpose of the Study:
- To develop mathematical models for ultrasonic scanning of tissue sections.
- To discern signals from erythrocytes and leucocytes using Doppler imaging principles.
Main Methods:
- Construction of hydromechanic and acoustic microcirculation models.
- Utilizing a 20 MHz ultrasonic sensor for data acquisition and simulation.
Main Results:
- Modeling indicates that differentiating blood cells via ultrasound is feasible.
- Successful differentiation necessitates intricate analysis of echoed signal amplitude and frequency parameters.
Conclusions:
- Mathematical modeling provides a framework for understanding ultrasonic blood cell differentiation.
- Further research into signal parameter analysis is crucial for clinical applications.
Related Concept Videos
01:30Typical Model Studies
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
01:12Modeling and Similitude
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
01:21Design Example: Creating a Hydraulic Model of a Dam Spillway
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
01:24Rapidly Varying Flow
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
01:27Steady Flow of a Fluid Stream
Consider a control volume, such as a pipe with solid boundaries, through which fluid flows and changes direction due to the impulse exerted by the resulting force from the pipe walls. In steady flow, the mass of fluid entering the control volume at a given time, t, with velocity v1, is equal to the mass leaving after infinitesimal time dt, with velocity v2.
During this process, the momentum of the fluid within the control volume remains constant over the time interval dt. By applying the...
During this process, the momentum of the fluid within the control volume remains constant over the time interval dt. By applying the...
01:07Laminar and Turbulent Flow
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the streamlines...