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Table 2: 

Mean objective measurements of background noisea
CTDIw (mGy)15 mg I/mL20 mg I/mL
80 kV(p)100 kV(p)120 kV(p)135 kVp80 kV(p)100 kV(p)120 kV(p)135 kV(p)
3334.8 ± 0.1824.2 ± 0.2421.1 ± 0.1820.0 ± 0.2035.3 ± 0.1424.9 ± 0.0321.7 ± 0.0820.0 ± 0.16
3831.4 ± 0.2622.3 ± 0.3419.4 ± 0.2719.3 ± 0.1232.9 ± 0.2823.0 ± 0.0719.8 ± 0.1419.2 ± 0.02
4329.3 ± 0.1321.5 ± 0.1418.6 ± 0.0818.0 ± 0.1529.7 ± 0.2821.6 ± 0.2818.6 ± 0.0717.7 ± 0.02
4820.2 ± 0.1617.7 ± 0.1916.9 ± 0.1620.5 ± 0.2817.9 ± 0.0116.6 ± 0.02
5319.4 ± 0.1116.6 ± 0.2116.3 ± 0.1319.4 ± 0.1316.5 ± 0.1615.9 ± 0.02
  • 
 

    a Data are the mean ± SD.