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3D intensity plot of lens-free images of six samples. (a) 20 μm bead; (c) HepG2; (e) RBC; (g) MCF7; (i) HeLa cell; and (k) 10 μm bead. (b), (d), (f), (h), (j), and (l) are the 3D intensity plots corresponding to (a), (c), (e), (g), (i), and (k), respectively.
