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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: Med Image Anal. 2020 Apr 22;63:101710. doi: 10.1016/j.media.2020.101710

Figure 1. Summary of training data generation.

Figure 1.

(a) Piecewise smooth input stiffness maps are generated by smoothing 3D Gaussian noise fields with 3D Gaussian kernels of randomly chosen x, y, and z dimensions. (b) Point-source wave sources are placed at the boundary of the simulation and the forward problem is solved to generate a wave image. (c) A 9×9×9 voxel patch, one such patch shown in the white square in (a) and (b), is taken from near the center of the simulation. The temporal first harmonic is taken after each patch has had noise added to generate the input features for the neural network.