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US 11,940,531 B2Granted
Crosstalk-free source encoding for ultrasound tomography
AssigneeThe Trustees of Princeton University
InventorsEtienne Bachmann, Gregory L. Davies, Jeroen Tromp
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Abstract
This disclosure describes systems and methods for crosstalk-free source encoding for ultrasound tomography. This disclosed systems and methods feature real data acquisition acceleration and/or numerical simulation acceleration (or image processing acceleration).
Claims27
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.
8 more elements
A method for ultrasound tomography, comprising:
- (i) transmitting, by a plurality of sources, waves at one or more frequencies within a frequency bandwidth;
- (ii) receiving, by one or more receivers, the waves transmitted by the plurality of sources;
- iii) using, by a processor, a computerized representation of physical property maps of a medium that influence wave propagation;
- (iv)modeling, by the processor, all the sources and the receivers involved in a dataset;
- (v) associating, by the processor, 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
- (iv) performing, by the processor, 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 the 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.
6 more elements
Dependencies are inferred from the claim text.