X-ray photon interaction with matter can occur in various forms:
- Photoelectric effect {low energy photon (energy just greater than binding energy of electron) interacts with innermost shell electron}- MCQ
- directly proportional to atomic number of matter
- inversely proportional to cube of incident photon energy
- maximum with tightly bound electrons (i.e. innermost shell - K)
- Compton scattering/effect
- is the cause of scatter radiation and thus increase radiation dose
- does not depend on atomic number
- inversely proportional to photon energy
- Coherent scattering
- Pair production (not important in diagnostic radiology)
Author: Dr Ayush Goel
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