(a) CT
(b) PET
(c) NSCT [1]
(d) NSCT [6]
(e) JSR [12]
(f) SR + NSCT [15]
(g) SR + NSCT [18]
(h) SR + SM
(i) SR + EM
(j) SR + SEM
(k) CT
(l) PET
(m) NSCT [1]
(n) NSCT [6]
(o) JSR [12]
(p) SR + NSCT [15]
(q) SR + NSCT [18]
(r) SR + SM
(s) SR + EM
(t) SR + SEM
Figure 7: The CT and PET image fused results of different fusion methods.