Let's look at the principle of X-ray: X-ray can't penetrate metal because it is strongly absorbed by metal. Bone contains a lot of calcium (a metal), which can absorb X-rays. Metals can absorb X-rays because the light wave energy of X-rays is enough to excite electrons in the inner orbit of metal ions. When electrons are excited, they absorb the light energy of X-rays and make a transition. At this time, X-rays are converted into ionization energy and remain in electrons. However, the energy required for electronic transition of nonmetallic elements is very low. Even if all electrons are excited, it is not enough to absorb all the energy of X-rays. Unabsorbed X-rays can pass through the non-skeletal parts of human body.
Have I made myself clear? If you still don't know anything, you can go to the Simesi plastic surgery website, which has a lot of plastic surgery tips and knowledge, and you can also consult their experts. I wish your friend success in breast augmentation ~