Table 1: The CTDIvol values obtained at each set of acquisition conditions.

Tube current-time product (mAs)CTDIvol (mGy)
120 kVp80 kVp

15010.193.24
20013.594.33
25016.995.41
30020.396.49
35023.557.49
40026.918.57
45030.289.64
50033.6410.71
55037.0011.78
60040.3712.85
65043.7313.92