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Image RMSE, δ, for ℓ2-magnitude and ℓ2-TV reconstructions and ε = 10−3, 10−4, and 10−5. Left: fixed Nbins = 2N = 512, as function of Nviews. Right: fixed Nviews = 2N = 512, as function of Nbins. The horizontal dashed line shows the level of the minimum gray-level contrast in the breast phantom. The labels SSC1, SSC3, and SSC4 are the sufficient-sampling conditions discussed in Section IV-A.
