A model for the propagation and scattering of ultrasound in tissue.
An inhomogeneous wave equation is derived describing propagation and scattering of ultrasound in an inhomogeneous medium. The scattering term is a function of density and propagation velocity perturbations. The integral solution to the wave equation is combined with a general description of the field from typical transducers used in clinical ultrasound to yield a model for the received pulse-echo pressure field. Analytic expressions are found in the literature for a number of transducers, and any transducer excitation can be incorporated into the model. An example is given for a concave, nonapodized transducer in which the predicted pressure field is compared to a measured field.
Jensen
J A
JA
Electronics Institute, Technical University of Denmark, Lyngby.
D000162:Acoustics; D000465:Algorithms; D003196:Computer Graphics; D003198:Computer Simulation; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation*; D008962:Models, Theoretical; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation*