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Table 1: 
Dose parameters
Group80 kV100 kV120 kVStudy GroupControl Group (120 kV)
n1825105345
kV8010012097 ± 14120
Reference mAs210145140166 ± 32140
Effective mAs224 ± 14165 ± 22144 ± 11181 ± 37141 ± 9
CTDIvol, mGyb4.2 ± 0.3a6.5 ± 0.9a9.7 ± 0.76.3 ± 2.1a9.5 ± 0.6
DLP, mGy cmb134.5 ± 19.6a208.7 ± 40a299.5 ± 54.9200.6 ± 69.4a292.8 ± 46.2
  • Note:—The Reference mAs are automatically adapted to match the image quality level of 140 mA at 120 kV.
  • ↵a P < .05.
  • ↵b CTDIvol and DLP referenced to 32-cm phantom.