US 11,719,613 B2
Method and device for quantifying viscoelasticity of a medium
Qiong He, Wuxi (CN); Jinhua Shao, Wuxi (CN); Jin Sun, Wuxi (CN); Houli Duan, Wuxi (CN); and Qiang Wang, Wuxi (CN)
Assigned to WUXI HISKY MEDICAL TECHNOLOGIES CO., LTD., Wuxi (CN)
Filed by WUXI HISKY MEDICAL TECHNOLOGIES CO., LTD., Wuxi (CN)
Filed on Jan. 17, 2020, as Appl. No. 16/746,698.
Application 16/746,698 is a continuation of application No. PCT/CN2018/088405, filed on May 25, 2018.
Claims priority of application No. 201710649552.9 (CN), filed on Jul. 21, 2017.
Prior Publication US 2020/0150013 A1, May 14, 2020
Int. Cl. G01N 11/16 (2006.01); A61B 8/08 (2006.01); G06T 7/40 (2017.01)
CPC G01N 11/16 (2013.01) [A61B 8/0858 (2013.01); A61B 8/485 (2013.01); A61B 8/5207 (2013.01); G06T 7/40 (2013.01); G01N 2203/0094 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for quantifying viscoelasticity of a medium, wherein the method comprises:
generating, by an exciting device, a vibration excitation on the medium to make the medium generate vibration and make the vibration propagate in the medium;
performing, by an imaging device, imaging for the medium after the vibration excitation is generated by virtue of a detection wave of the imaging device;
obtaining, by the imaging device, a position-time graph of vibration propagation along a set vibration propagation direction from dynamic imaging of the medium, wherein a horizontal axis of the position-time graph indicates time, and a vertical axis of the position-time graph indicates a position of wave-front of the vibration;
performing angle projection along directions having respective angles relative to a preset line of 0 degree on the position-time graph to determine a slope of the position-time graph corresponding to an angle with maximum signal energy, wherein the respective angles are within a preset angle range; and
obtaining, according to the slope, propagation velocity of the vibration, and determining, according to principle of mechanics and the propagation velocity of the vibration, a viscoelasticity parameter of the medium;
wherein the performing the angle projection along the directions having respective angles relative to the preset line of 0 degree on the position-time graph to determine the slope of the position-time graph corresponding to the angle with maximum signal energy, comprises:
performing integral calculation along each angle within the preset angle range on the position-time graph, wherein the integral calculation is Radon transform;
determining an angle corresponding to a maximum integral value obtained by the Radon transform as a slope angle of a slope line of the position-time graph; and
determining the slope of the slope line using the slope angle.