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Progress in Orthodontics
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Table 3 Wilcoxon's signed-rank test to identify significant difference in terms of image quality and absorbed dose

From: Low-dose protocol of the spiral CT in orthodontics: comparative evaluation of entrance skin dose with traditional X-ray techniques

  LC + PAC + PR Low-dose CT P value
Image quality Satisfactory (3) Excellent (5) <0.05
Mean absorbed dose (mGy) 0.45 0.51 NS
  1. The level of significance was set at P < 0.05. NS, not statistically significant.
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