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

Claim 4:
5. The method of claim 3, wherein the lateral directions include a first lateral direction and a second lateral direction opposite to each other and parallel to the virtual line, which interconnects one of said at least two pairs of the abutment protrusions that corresponds to said one of the at least two testing positions;
wherein each of the sets of the lateral SFD displacement images includes a first lateral SFD displacement image and a second lateral SFD displacement image that respectively correspond to the first lateral direction and the second lateral direction;
wherein each of the sets of the lateral time-domain displacement images includes a first lateral time-domain displacement image and a second lateral time-domain displacement image that respectively correspond to the first lateral direction and the second lateral direction;
wherein the second filtering step includes, for each of the SFD displacement images, using a first mask and a second mask of a lateral two-dimensional (2D) Fourier transform that respectively correspond to the first lateral direction and the second lateral direction to perform filtering on the SFD displacement image to respectively obtain the first lateral SFD displacement image and the second lateral SFD displacement image of the set of the lateral SFD displacement images that corresponds to the SFD displacement image;
wherein the second time-domain transforming step includes performing, for each of the sets of the lateral SFD displacement images, 2D inverse Fourier transform on the first lateral SFD displacement image and the second lateral SFD displacement image to obtain the first lateral time-domain displacement image and the second lateral time-domain displacement image that corresponds to the first lateral direction and the second lateral direction, respectively;
wherein the elasticity analysis step includes calculating, based on a timewise variation of phases of the first lateral time-domain displacement images in the sets of the lateral time-domain displacement images in the first lateral direction, a first lateral elasticity data piece that corresponds to the first lateral direction, and calculating, based on a timewise variation of phases of the second lateral time-domain displacement images in the sets of the lateral time-domain displacement images in the second lateral direction, a second lateral elasticity data piece that corresponds to the second lateral direction.