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US 10,376,242 B2Granted
Quantitative viscoelastic ultrasound imaging
AssigneeSiemens Medical Solutions USA, Inc.
InventorsYassin Labyed, Liexiang Fan
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Abstract
Viscosity is included in the quantification by an ultrasound imaging system. The log of a spectrum of displacement as a function of time is determined for each of various locations subjected to a shear or other wave. Solving using the log as a function of location provides the complex wavenumber. Various viscoelastic parameters, such as loss modulus and storage modulus, are determined from the complex wavenumber.
Claims15
A method for quantification in viscoelastic ultrasound imaging, the method comprising:
- measuring, with an ultrasound system, displacement over time at a first location of tissue within a patient in response to an impulse excitation;
- measuring, with the ultrasound system, displacement over time at a second location of the tissue within the patient in response to the impulse excitation;
- Fourier transforming, by a processor, in time the displacement over time for each of the first and second locations;
- calculating, by the processor, a logarithm of results of the transforming of the displacement over time;
- solving, by the processor, for a complex wavenumber from the logarithm of the results;
- determining a value for a frequency-dependent viscoelastic parameter with the complex wavenumber;
- and
- outputting, to a display, the value for the tissue.
5 more elements
Dependencies are inferred from the claim text.