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Related Experiment Video

Updated: Jul 7, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure

Published on: February 8, 2022

Air-coupled Lamb wave tomography.

W Wright¹, D Hutchins, D Jansen

¹Dept. of Eng., Warwick Univ., Coventry.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1997

Summary

This summary is machine-generated.

This study introduces an air-coupled Lamb wave tomography system for defect imaging in thin plates. The novel technique successfully visualizes flaws in various materials, demonstrating its potential for non-destructive testing.

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Image Acquisition using Portable Sonography for Emergency Airway Management

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Area of Science:

Non-destructive testing
Ultrasonic imaging
Materials science

Background:

Traditional inspection methods can be limited in flexibility and resolution.
Air-coupled ultrasound offers a contact-free alternative for material inspection.

Purpose of the Study:

To develop and evaluate an air-coupled Lamb wave tomography system for defect imaging.
To assess the system's capability in detecting and visualizing defects in diverse thin plate materials.

Main Methods:

Utilized a pair of micromachined silicon capacitance transducers for data acquisition.
Employed a filtered back projection algorithm within a difference tomography framework.
Tested on thin plates (0.7 mm to 2.22 mm) of aluminum, Perspex, and carbon fiber reinforced polymer (CFRP).

Main Results:

Successfully reconstructed images of machined defects up to 10 mm in diameter.
Demonstrated the ability to resolve non-central defects and multiple flaws.
Images reflected changes in acoustic variables, with success varying by defect characteristics.

Conclusions:

The air-coupled Lamb wave tomography system is effective for imaging defects in thin plates.
The technique shows promise for flexible, non-destructive evaluation of various materials.
Defect detectability is influenced by size, shape, and location within the scanned area.