Patent ID: 11872083
Assignee: NATIONAL CHENG KUNG UNIVERSITY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 3:
4. The method of claim 3, wherein the second filtering step includes, for each of the SFD displacement images, using a mask of a lateral two-dimensional (2D) Fourier transform that corresponds to one of the lateral directions to perform filtering on the SFD displacement image to obtain one of the lateral SFD displacement images that corresponds to said one of the lateral directions in the set;
wherein the second time-domain step includes performing, for each of the sets of the lateral SFD displacement images, 2D inverse Fourier transform on said one of the lateral SFD displacement images to obtain one of the lateral time-domain displacement images that corresponds to said one of the lateral directions;
wherein the elasticity analysis step includes calculating, based on a timewise variation of phases of those of the lateral time-domain displacement images that correspond to said one of the lateral directions, a lateral elasticity data piece that corresponds to said one of the lateral directions.