Effect of Low Tube Voltage on Image Quality, Radiation Dose, and Low-Contrast Detectability at Abdominal Multidetector CT: Phantom Study

Figure 3

Graph shows relationship between CTDIvol and CNR. The Pearson correlation coefficient (𝑟) and the corresponding 𝑃 values were 𝑟=0.95 and 𝑃<0.001 at 80 kV and 𝑟=0.96 and 𝑃<0.001 at 120 kV.