I've been playing with a dental x-ray sensor and getting some pretty good results. Ultimately I'd like it to help reverse engineer PCBs and related security modules. Here is a shot where you can clearly see bond wires:
This is still relatively early in my testing and I can probably still do a lot more to get better resolution.
With basic imaging working, I'm trying to take it a step further and do CBCT. Sneak peak at setup:
I made some test shots into a video but I'm still in the process of trying to stitch them into a proper 3d model. I'm likely going to use plastimatch and/or RTK.
Once I get that working I'd like to try to laminography ("5DX"). Although I haven't looked too hard, I get the impression there might not be a lot of FOSS software to do this and so might require a bit more effort.
EDIT: slides from a presentation I did