As I understand: HU = CTnumber * Slope + intercept.
The two values are slope and intercept, in turn, takes the tag (0028, 1053) and the tag (0028, 1052), using ITK.
When displayed, the pixel intensity is used: Pixel_intensity = ((HU-P1) * pow (2, i-1)) / W.
Value of HU is determined by each machine: CT, MRI, …
Algorithms for image processing (filters, segmentation) only affect pixel_intensity. HU will not change during image processing. Is that right?
In my problem, geometry is built from HU value through the standard conversion function between HU and density.
So, as I understand, the application of image processing algorithms also does not make sense or affect the construction of geometry?