HYDROACOUSTICS
ANNUAL JOURNAL
START NEW VOL 20 SEARCH STATISTICS PAS - GDANSK DIVISION

Ilościowa ocena nieliniowej propagacji w wodzie i w tkance

pp. 53-56, vol. 3, 2000

L. Filipczyński
Zakład Ultradźwięków, Instytut Podstawowych Problemów Techniki PAN, Warszawa, Poland

Tamara Kujawska
Zakład Ultradźwięków, Instytut Podstawowych Problemów Techniki PAN, Warszawa, Poland

R. Tymkiewicz
Zakład Ultradźwięków, Instytut Podstawowych Problemów Techniki PAN, Warszawa, Poland

Janusz Wójcik
Zakład Ultradźwięków, Instytut Podstawowych Problemów Techniki PAN, Warszawa, Poland

Key words:

Abstract: Nonlinear propagation effects were investigated numerically and experimentally u water and In blood from the point of view of ultrasonic diagnostic applications in cardiology. Pressure distributions of short and long pulses with the frequency of 3 and 3.5 MHz, radiated by a typical cardiological probe, were found along the ultrasonic beam axis. The numerial results were obtained by means of the numerical code WJ developed previously. The experimental pressure distributions were measured by means of a membrane PYDF hydrophone. The obtained numerical and experimental results showing the distributions of the 2-nd and 1-st harmonics have shown good agreement allowing us to determine some diagnostic conclusions.

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© Polish Acoustical Society - Gdansk Department, Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported. (CC BY-NC-SA 3.0)