516919.fig.001a
(a)  Original SDCT image with tube current time product 150 mAs
516919.fig.001b
(b) Original LDCT image with tube current time product 30 mAs
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(c) Original SDCT image with tube current time product 150 mAs
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(d) Original LDCT image with tube current time product 60 mAs
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(e) LDCT image (b) processed by PMD with , and and iteration number is 15
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(f) LDCT image (d) processed by PMD with , and and iteration number is 15
516919.fig.001g
(g) LDCT image (b) processed by RPMD with , , and and iteration number is 15
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(h) LDCT image (b) processed by FOPMD in [9] with , , and and iteration number is 15
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(i) LDCT image (b) processed by EFOGV-PMD with , and and iteration number is 15
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(j) LDCT image (d) processed by RPMD with , , and and iteration number is 15
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(k) LDCT image (d) processed by FOPMD in [9] with , , and and iteration number is 15
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(l) LDCT image (d) processed by EFOGV-PMD with , , and iteration number is 15
Figure 1: Original SDCT and LDCT images ((a)–(d)), LDCT images processed by PMD, RPMD, FOPMD and EFOGV-PMD with fractional-order and iteration number is 15.