COMPTON SCATTERING SIMPLE EXPLANATION

In Compton Scattering, the x-ray photon interacts with an electron in the outer shell, and hence the likelihood of Crompton Scattering doesn’t depend on Z.

From the above figure, we can see that the electron was removed from the shell by the X-Ray photon. In order to conserve momentum, the photon then goes out in an opposing direction from the knocked-out electron.

Differ from the photoelectric effect, the energy is not all deposited locally.

The scattered photon may still have a significant fraction of the energy of the incoming photon. It can still travel through the patient and potentially could have a secondary scatter effect or could get measured on the detector.