Derivative of 2D dose (intensity) image wrt distance

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De Ar il 7 Dic 2022

I have a 2D image of size M×N representing a radiation dose map with a local dose

, where

is the spatial coordinate. I want to estimate both derivatives

and

with respect to r - how do I do that? If neccessary, the spatial resolution is 21

/pixel and isotropic.

Thanks in advance for any help or guidance!

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