Table 2:

Objective noise at upper neck and shoulder levels, and mean tube current-time product (mAs) in the study and control groups

NI 8NI 10Fixed current
Upper neck7 ± 1.2 HU6.9 ± 1.2 HU5.9 ± 2.1 HU
Shoulder20.6 ± 6.2 HU21.8 ± 4.5 HU16.2 ± 6 HU
mAs186.3 ± 20.5158.1 ± 21.2235 ± 21.8

  • Note:—NI indicates noise index; HU, Housfield units. All measurements are mean ± SD.