Figure 3 demonstrates the influence of b, which is used to determine the strength of the tube
current modulation. For our practice, we have found that b = 0.36 (HVLe
= 10 cm) for
abdomen and pelvis scans generate clinically acceptable image quality across the full
spectrum of patient sizes. (For chest scans, we found b = 0.28 [HVLe
= 13 cm] yields
acceptable images for all patient sizes.)