Determination of the Ultrasonic Non-linearity Parameter B/A versus Frequency for Water

Copyright © 2020 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved..

For tissue characterization, it is desirable to determine B/A using high-frequency transducers. Moreover, an accurate estimate of B/A at elevated frequencies (or at least the assumption of frequency independence of B/A) is required to evaluate the safety of high-frequency systems. However, common finite-amplitude approaches become increasingly inaccurate at high frequencies. In this article, a practical variation of the finite-amplitude method is proposed which combines experiments with numerical simulations of the Khokhlov-Zabolotskaya-Kuznetsov equation and can be used at elevated frequencies. The results at low frequencies show that the proposed approach is accurate with lower uncertainties compared with the finite-amplitude method because it avoids assumptions and approximations. The measured values of B/A versus frequency for water at 2.25-20 MHz show that there is no statistically significant variation in B/A values with frequency, and therefore the assumption of frequency independence of B/A is realistic.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:47

Enthalten in:

Ultrasound in medicine & biology - 47(2021), 3 vom: 10. März, Seite 809-819

Sprache:

Englisch

Beteiligte Personen:

Jafarzadeh, Ehsan [VerfasserIn]
Amini, Mohammad H [VerfasserIn]
Sinclair, Anthony N [VerfasserIn]

Links:

Volltext

Themen:

059QF0KO0R
Comparative Study
Finite-amplitude method
Journal Article
KZK equation
Nonlinear acoustics
Nonlinearity parameter B/A
Research Support, Non-U.S. Gov't
Water

Anmerkungen:

Date Completed 26.08.2021

Date Revised 26.08.2021

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.ultrasmedbio.2020.11.027

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM319182371