Hey I’m currently working on a personal project where i try to reconstruct CT scans image and the last part of my project include visualizing my reconstructed image in 3D. But i’m currently stuck, I successfully reconstructed all the slices of a brain scan i’m working with but to plot it in 3D i have to interpolate / create images between slice so that i have the same resolution in all dimensions. But interpolating naively with regard to the intensity values produces grey, sloppy and wrong values. instead of interpolating between the images i need to find a transformation that turns one slice into the next and incrementing this transformation to the right value so i end up with a new image at the right depth between the slices. I cannot seem to find how to code the transformation and apply it so i’m here seeking help, I don’t know if its the right place to ask this question as it’s my first time here, sorry for my english. I hope you can help me, and thank you for your attention. 
PS : i work in python, then i’m gonna work in C and i’m coding every function i’m not using pré-coded function from librairies