Hi Karina, many thanks for your comment. I translated information I took from a Dutch national site, and your comment made me doubt the correctness. I checked and this is what I found on the site of BreastCancer.org:

A mammogram technician positions and compresses your breast between two clear plastic plates and takes two X-ray pictures — one from the top and one from the side.

It seems the correct term should indeed be X-ray.