CPC G01S 15/8977 (2013.01) [A61B 8/5207 (2013.01); G01S 7/52036 (2013.01); G01S 15/8952 (2013.01); G01S 15/8963 (2013.01); A61B 8/0825 (2013.01); A61B 8/587 (2013.01); G01S 7/52052 (2013.01); G01S 15/8993 (2013.01)] | 27 Claims |
1. A system for ultrasound tomography, comprising:
a plurality of sources configured to transmit waves at one or more frequencies within a frequency bandwidth;
one or more receivers configured to receive the waves transmitted by the plurality of sources; and
a processor configured to:
(a) use a computerized representation of physical property maps of a medium that influence wave propagation;
(b) model all the sources and the receivers involved in a dataset;
(c) associate to each of the sources a sinusoidal source time function with a defined frequency of a set of frequencies regularly spaced within a bandwidth of interest; and
(d) perform a wave propagation simulation where sources are transmitting simultaneously for a time Tss+kΔτ, where Tss is a simulation duration for simulated wavefield to reach a steady state, k is an integer>=1, and Δτ=1/Δƒ
wherein the cost function comprises a source-encoded cost function that integrates contributions from all sources, and
wherein the cost function comprises waveform differences, phase and amplitude measurements, double-difference phase and amplitude measurements, cross-correlation traveltime measurements, or a generic adjoint tomography cost function.
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