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a) A point in the imaged object is typically assumed to give rise to an arc in e-t space. b) However, reconstructing the arc in (a) with delay-and-sum beamforming does not yield a point in the image plane, but rather a spatially broad distribution of signal. c) At least in principle, when applied to artificial signals such as that in (a), the proposed approach can reconstruct images that are vastly improved in terms of spatial resolution as compared to delay-and-sum beamforming.
