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Figure 11: Decomposition results of two chest radiographs from the JSRT data set: (a) the original chest radiographs (“JPCLN063” and “JPCNN071”); (b) the reconstructed soft tissue images by the use of our method; (c) the bone-suppressed images by the use of the gradient modification method; (d) the reconstructed bone images by the use of our method; (e) the estimated bone structures by the use of the gradient modification method.