I remember in the book, elements of modern X-ray physics, written by jens als-nielsen, there is a chapter introducing the Xray imaging and tomography and how to retrieve the phase by iteration. There is also a MATLAB function attached at the appendix in that book. I hope my answer can help.

Yizhou Lu , Thanks for your recommendation.

I have skimmed over the book , while the book is introducing the iteration between x-ray and matters, it's more related to the application of x-ray in material science. The last chapter is the absorption and phase contrast imaging of x-ray, but there seems no phase retrieval related content in the book. Anyway, thanks you!