EPFL
 Biomedical Imaging GroupSTI
EPFL
  Publications
English only   BIG > Publications > Acoustical Imaging


 CONTENTS
 Home Page
 News & Events
 People
 Publications
 Tutorials and Reviews
 Research
 Demos
 Download Algorithms

 DOWNLOAD
 PDF
 Postscript
 All BibTeX References

A Bulk Modulus Dependent Linear Model for Acoustical Imaging

J.M. Mari, T. Blu, O.B. Matar, M. Unser, C. Cachard

The Journal of the Acoustical Society of America, vol. 125, no. 4, pp. 2413-2419, April 2009.



Modeling the acoustical process of soft biological tissue imaging and understanding the consequences of the approximations required by such modeling are key steps for accurately simulating ultrasonic scanning as well as estimating the scattering coefficient of the imaged matter. In this document, a linear solution to the inhomogeneous ultrasonic wave equation is proposed. The classical assumptions required for linearization are applied; however, no approximation is made in the mathematical development regarding density and speed of sound. This leads to an expression of the scattering term that establishes a correspondence between the signal measured by an ultrasound transducer and an intrinsic mechanical property of the imaged tissues. This expression shows that considering the scattering as a function of small variations in the density and speed of sound around their mean values along with classical assumptions in this domain is equivalent to associating the acoustical acquisition with a measure of the relative longitudinal bulk modulus. Comparison of the model proposed to Jensen's earlier model shows that it is also appropriate to perform accurate simulations of the acoustical imaging process.


@ARTICLE(http://bigwww.epfl.ch/publications/mari0901.html,
AUTHOR="Mari, J.M. and Blu, T. and Matar, O.B. and Unser, M. and
        Cachard, C.",
TITLE="A Bulk Modulus Dependent Linear Model for Acoustical Imaging",
JOURNAL="The Journal of the Acoustical Society of America",
YEAR="2009",
volume="125",
number="4",
pages="2413--2419",
month="April",
note="")

© 2009 ASA. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from ASA.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.