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Biomedical Applications of Vibration and Acoustics in Imaging and Characterizations

Editor
Mostafa Fatim
Mostafa Fatim
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Ahmed Al-Jumaily
Ahmed Al-Jumaily
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ISBN-10:
0791802731
ISBN:
9780791802731
No. of Pages:
320
Publisher:
ASME Press
Publication date:
2008

Quantitative measurement of tissue elasticity and viscosity has important medical applications because pathologies are often linked to abnormal tissue mechanical properties. Shearwave Dispersion Ultrasound Vibrometry (SDUV) is proposed to quantify tissue viscoelasticity. SDUV uses a focused ultrasound beam within FDA safety limits to stimulate formation and propagation of harmonic shear waves in the studied tissue. The propagation speed of induced shear wave is frequency-dependent (dispersive) and relates to the tissue's mechanical properties. Shear wave speeds at a number of frequencies are measured by pulse-echo ultrasound setup and fit with a theoretical dispersion model to inversely solve for tissue elasticity and...

Abstract
12.1 Introduction
12.2 Principle of SDUV
12.3 Vibration Detection with Pulse-Echo Ultrasound
12.4 Motion Generation and Detection with a Single-Array Transducer
12.4.1 Motivation
12.4.2 Challenges
12.4.3 Intermittent Pulse Sequence
12.5 Discussion
12.6 Conclusions
References
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