What is the scattering process called where low-energy photons scatter without energy loss?

Coherent scattering is the process in which low-energy photons scatter without any energy loss. This occurs when photons interact with matter and change direction but maintain their energy levels. In this scenario, the incoming photon interacts with the whole atom or a small group of atoms, resulting in a scatter without an exchange of energy. Because of this no-energy-loss characteristic, coherent scattering is significant at lower photon energies, such as those encountered in mammography.

Additional insights into coherent scattering reveal that it primarily involves elastic scattering, where the scattered photon retains its original energy after interacting with the target material. This contrasts with other scattering processes where energy may be lost or redistributed. Understanding this process is essential for interpreting various phenomena in radiology, particularly in the context of imaging, as it affects image quality and the dose received by the patient.