Homogeneity on rectangular frames

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IQI Homogeneity CBCT161 ROIs.png
IQI Homogeneity CBCT161 ROIs legend.png


$ Homogeneity_{mean}= \frac{\sum\limits^{^8}_{i=1} \left\vert \mu_i-\mu_r \right\vert}{8} $
$ Homogeneity_{max diff}= \max\limits^{^8}_{i=1} \left\vert \mu_i-\mu_r \right\vert $

where:

  • $ \mu_i $: mean pixel value of the i-th detail ROI
  • $ \mu_r $: mean pixel value of the reference ROI