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defines angular pixel coordinates with correct offset relative to minimal angle,

and gives 3 bins in radial direction from 10mm to 80mm and 8 bins in angle from -20 to 240 degree:

Pixels masked by the n-d array passed in the parameter mask are excluded from this algorithm and are not corrected.

Averaged background intensity for default and non-default binning cases (nphibins=8, nradbins=500):

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