Real-time Reconstruction of Shear Modulus Distribution by Calculating Strain Ratio

In this report, we reviewed our previously developed 1D reconstruction methods. By assuming 1D stress distribution, shear modulus distribution can be approximately obtained by evaluating ratios of measured strains generated in the direction of predominant tissue deformation. Since singularity might occur during calculating ratios, 1D implicit-integration is performed at the singular positions. The shear modulus distribution resulting from calculated ratio of the strains is also utilized as an initial estimate in 1D, 2D, and 3D implicit-integration. To verify the usefulness of the 1D methods, the 1D methods are compared to conventional B-mode imaging and strain imaging.