Title :
Green´s function method for modeling nonlinear three-dimensional pulsed acoustic fields in diagnostic ultrasound including tissue-like attenuation
Author :
Huijssen, J. ; Verweij, M.D. ; de Jong, N.
Author_Institution :
Lab. of Electromagn. Res., Delft Univ. of Technol., Delft
Abstract :
The iterative nonlinear contrast source (INCS) method, developed previously to predict the nonlinear acoustic pressure field excited by a medical diagnostic phased array transducer in a lossless medium, is extended to deal with media showing attenuation of a frequency power law type. For a linear case, comparison shows an excellent agreement between the results of the extended INCS method and the FieldII program. For a nonlinear case, the INCS method is used to show that the axial field profile of the second harmonic component in a medium with a frequency power law attenuation with a power b = 1.14 differs considerably from the field profiles in a lossless medium and in a medium with b = 2, i.e. square power law attenuation.
Keywords :
Green´s function methods; acoustic field; acoustic pulses; biological tissues; biomedical ultrasonics; harmonic generation; nondestructive testing; nonlinear acoustics; patient diagnosis; ultrasonic absorption; ultrasonic transducers; FieldII program; Green´s function method; acoustic attenuation; diagnostic ultrasound; frequency power law attenuation; iterative nonlinear contrast source method; lossless medium; medical diagnostic phased array transducer; nonlinear 3D pulsed acoustic field; nonlinear acoustic pressure field; second harmonic component; square power law attenuation; tissue-like attenuation; Acoustic pulses; Attenuation; Biomedical acoustics; Frequency; Green´s function methods; Iterative methods; Medical diagnosis; Nonlinear acoustics; Phased arrays; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0092
