US 10,376,242 B2
Quantitative viscoelastic ultrasound imaging
Yassin Labyed, Issaquah, WA (US); and Liexiang Fan, Sammamish, WA (US)
Assigned to Siemens Medical Solutions USA, Inc., Malvern, PA (US)
Filed by Siemens Medical Solutions USA, Inc., Malvern, PA (US)
Filed on Apr. 16, 2015, as Appl. No. 14/688,965.
Prior Publication US 2016/0302769 A1, Oct. 20, 2016
Int. Cl. A61B 8/08 (2006.01); A61B 8/00 (2006.01); G01S 7/52 (2006.01)
CPC A61B 8/485 (2013.01) [A61B 8/085 (2013.01); A61B 8/0833 (2013.01); A61B 8/463 (2013.01); A61B 8/5223 (2013.01); G01S 7/52042 (2013.01); A61B 8/4483 (2013.01)] 15 Claims
OG exemplary drawing
 
1. 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.