130169.fig.003
Figure 3: Graph shows relationship between CTDIvol and CNR. The Pearson correlation coefficient ( 𝑟 ) and the corresponding 𝑃 values were 𝑟 = 0 . 9 5 and 𝑃 < 0 . 0 0 1 at 80 kV and 𝑟 = 0 . 9 6 and 𝑃 < 0 . 0 0 1 at 120 kV.