(ie,
relatively less noise for smaller patients and more noise for larger patients) is achieved when
b < 1. Alternatively, requiring less noise in obese patients and more noise in small patients,
relative to the standard patient size, is achieved when b > 1. For a given patient thickness,
tube current values (for a given b value) relative to our clinical abdomen/pelvis practice (b =
0.36 and b = 0.28 for our thorax protocols) can be calculated using Eq. (8):