(a)
(b)
(c)
(d)
(e)
Figure 3: Results of quantitative indices: LMR (a), LSR (b), CR (c), SNR (d), and CNR (e). Error bars indicate SDs. FA12 and FA30 represent FAs of 12° and 30°, respectively. G1.0, G1.2, G1.5, and G1.8 represent the gamma values of 1.0, 1.2, 1.5, and 1.8, respectively.