What is a scintillator? A scintillator is a material that absorbs X-ray photons and converts their energy into visible light. This light can then be detected by photodiodes or other sensors and converted into an electrical signal to form a…
What is the difference between direct and indirect digital radiography? The difference between direct and indirect digital radiography lies in how the detector converts incoming X-ray photons into an electrical signal. In indirect digital radiography, X-ray photons are first converted…
How are X-rays converted into a radiographic image? Radiographic images are formed when X-ray photons that have passed through the patient interact with an image detector, where their energy is converted into an electrical signal that can be processed and…
Why do bones appear white on X-rays? Bones appear white on X-rays because they attenuate the X-ray beam more strongly than surrounding soft tissues, allowing fewer photons to reach the detector. This strong attenuation is mainly due to the higher…
What factors affect X-ray attenuation? X-ray attenuation is influenced primarily by photon energy, atomic number of the material, electron density, physical density, and the thickness of the material the beam passes through. These factors determine the probability that photons will…
What is coherent (Rayleigh) scattering? Coherent scattering, also known as Rayleigh scattering, is an interaction in which an X-ray photon interacts with an atom and is scattered without loss of energy. The photon changes direction but retains the same energy…
What determines whether photoelectric absorption or Compton scattering occurs? Whether an X-ray photon undergoes photoelectric absorption or Compton scattering depends mainly on the photon energy and the atomic number of the material it interacts with. Photoelectric absorption is more likely…
What is Compton scattering? Compton scattering is an interaction in which an X-ray photon collides with a loosely bound outer-shell electron, transferring part of its energy to the electron and being deflected in a different direction. The photon continues with…
What is the photoelectric effect? The photoelectric effect is an interaction in which an X-ray photon transfers all of its energy to an inner-shell electron, ejecting that electron from the atom. The photon is completely absorbed, and the ejected electron…
What is the linear attenuation coefficient? The linear attenuation coefficient (μ) describes how strongly a material attenuates an X-ray beam per unit thickness. It represents the probability that an X-ray photon will be removed from the primary beam by absorption…
