Table 4. Average control mean Gray value at 70 kVp and slope of the trend in control mean at 70 kVp, under the conditions “with” and “without metal” and “with” and “without MAR”.
Control mean at 70 kVp |
Slope at 70 kVp |
||
Metal | MAR | Mean ± SE | Slope ± SE |
Without | Without | 49.4 ± 0.3 | −0.56 ± 0.01 |
With | 38.3 ± 0.3a | −0.20 ± 0.01a | |
With | Without | 49.5 ± 0.3b | −0.57 ± 0.01b |
With | 38.2 ± 0.3a,c | −0.21 ± 0.01a,c |
MAR, metal artefact reduction; SE, standard error.
aSignificantly (p ≤ 0.05) different from without metal and without MAR.
bSignificantly (p ≤ 0.05) different from without metal and with MAR.
cSignificantly (p ≤ 0.05) different from with metal and without MAR.