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Difference images between the reconstructed images from partially unblocked projections and reconstructed images from full projections. (a), (b) and (c): difference images between Figs. 5(b)–5(d) and Fig. 5(a); (d), (e) and (f): difference images between Figs. 5(g)–5(i) and Fig. 5(f); Display window [−350, 350] HU.
