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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 a...

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Ultrasound Velocity Measurement in a Liquid Metal Electrode

Ultrasound Velocity Measurement in a Liquid Metal Electrode

Published on: August 5, 2015

High-data-rate ultrasonic through-metal communication.

Kevin Wanuga, Magda Bielinski, Richard Primerano

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|September 26, 2012

Summary

A novel link-adaptive orthogonal frequency division multiplexing (OFDM) ultrasonic physical layer enables high-speed data transmission through metal walls. This technology significantly boosts communication throughput, outperforming existing narrowband and high-frequency methods.

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Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Area of Science:

Wireless Communication
Acoustic Engineering
Signal Processing

Background:

Metal walls impede conventional wireless communication, necessitating alternative transmission methods.
Existing ultrasonic communication systems often suffer from low data rates and poor spectral efficiency.

Discussion:

A link-adaptive orthogonal frequency division multiplexing (OFDM) ultrasonic physical layer is introduced for robust, high-data-rate communication.
This system bypasses physical penetration, enabling data transfer directly through metal barriers.
Link-adaptive OFDM effectively combats frequency-selective fading inherent in ultrasonic channels.

Key Insights:

Demonstrates a 300% throughput improvement compared to current narrowband low-frequency ultrasonic techniques.
Achieves superior spectral efficiency relative to high-frequency ultrasonic communication methods in the literature.
Establishes a viable physical layer for reliable data transmission in challenging metallic environments.

Outlook:

Potential for enhanced industrial IoT and secure communication within metallic structures.
Further research can optimize adaptive algorithms for diverse metal types and thicknesses.
Exploration of higher frequencies for even greater bandwidth in ultrasonic communication.