Contrast-to-Noise Ratio

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IQI CNR ROIs.png
IQI CNR ROIs legend.png


$ CNR = \frac{|\mu_D-\mu_B|}{\sigma_B} $

where:

  • $ \mu_D $: mean pixel value of the detail ROI
  • $ \mu_B $: mean pixel value of the background ROI
  • $ \sigma_B $: standard deviation of pixel values of the background ROI