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Ultrasonography

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...

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Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release

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Determination of Bubble Size Distribution Using Ultrasound Array Imaging.

Marcus Ingram, Carmelo Mineo, Anthony Gachagan

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|February 15, 2020

Summary

Ultrasonic phased arrays offer novel industrial process analysis for measuring bubble size distribution (BSD). This technology provides accurate, focused imaging for both intrusive and noninvasive measurements.

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Area of Science:

Industrial Process Analysis
Ultrasonic Imaging
Fluid Dynamics

Background:

Ultrasonic phased arrays are established tools in sonar, medical imaging, and nondestructive testing.
Their application in industrial process analysis, particularly for bubble size distribution (BSD) measurement, remains largely unexplored.
Current ultrasound tomography methods lack the focused imaging capabilities offered by phased arrays.

Purpose of the Study:

To explore the potential of ultrasonic phased arrays for industrial process analysis.
To demonstrate the application of this technology for measuring bubble size distribution (BSD).
To evaluate both intrusive and noninvasive measurement capabilities.

Main Methods:

Utilized a 32-element, 5-MHz linear phased array with the total focusing method to generate ultrasound images.
Developed and evaluated an image processing algorithm for BSD determination under stationary and dynamic conditions.
Integrated the phased array with a robotic arm for high-velocity scanning and applied it to a water-air bubble stream.

Main Results:

Achieved sizing accuracy within 10% for stationary reflectors larger than 4λ in diameter.
Demonstrated sizing accuracy within 45% for bubbles up to 300 mms^-1, with algorithm breakdown for smaller reflectors at higher velocities.
Successfully generated intrusive and noninvasive images of air bubbles in water, despite scattering effects from high bubble density.

Conclusions:

Ultrasonic phased arrays show significant potential for accurate BSD measurement in industrial processes.
The technology is viable for both intrusive and noninvasive applications, even through barriers.
Further research may address scattering limitations in high-density, dynamic environments.