K-line (x-ray)

A K-line, in the context of X-ray imaging, refers to a specific feature related to X-ray photography and diagnosis. It pertains to the K-shell electrons of an atom, particularly in relation to the interaction between X-ray photons and the materials they pass through. In X-ray imaging, when an incident photon has enough energy, it can ionize an atom by ejecting an electron from its K-shell (the innermost shell of electrons).