DocumentCode :
1184332
Title :
Computer simulation of forward wave propagation in soft tissue
Author :
Varslot, T. ; Taraldsen, Gunnar
Author_Institution :
Dept. of Math. Sci., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
Volume :
52
Issue :
9
fYear :
2005
Firstpage :
1473
Lastpage :
1482
Abstract :
A method for simulating forward wavefront propagation in heterogeneous tissue is discussed. The intended application of this method is for the study of aberration produced when performing ultrasound imaging through a layer of soft tissue. A one-way wave equation that permits smooth variation in all acoustically important variables is derived. This equation also describes tissue exhibiting nonlinear elasticity and arbitrary frequency-dependent relaxation. A numerical solution to this equation is found by means of operator splitting and propagation along the spatial depth coordinate. The numerical solution is accurate when compared to analytical solutions for special cases, and when compared to numerical solutions of the full wave equation by other methods. The presented implementation provides a fast numerical method for studying the impact of aberration in medical ultrasound imaging through soft tissue - both on the transmitted beam and the nonlinearly generated harmonic beam.
Keywords :
biological tissues; biomechanics; biomedical ultrasonics; elasticity; arbitrary frequency-dependent relaxation; forward wave propagation; heterogeneous tissue; medical ultrasound imaging; nonlinear elasticity; nonlinearly generated harmonic beam; one-way wave equation; operator splitting; soft tissue; spatial depth coordinate; ultrasound imaging; Acoustic beams; Acoustic imaging; Acoustic propagation; Application software; Biological tissues; Computational modeling; Computer simulation; Nonlinear equations; Partial differential equations; Ultrasonic imaging; Animals; Computer Simulation; Connective Tissue; Humans; Models, Biological; Radiation Dosage; Radiometry; Scattering, Radiation;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/TUFFC.2005.1516019
Filename :
1516019
Link To Document :
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