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Physics of Radiography Vicki@sciencewow.co.uk www.sciencewow.co.uk

Physics of Radiography Vicki@sciencewow.co.uk www.sciencewow.co.uk. Physics of Radiography Structure of an atom Wave theory Quantum theory of electromagnetic radiation Physical properties of X-rays X-ray spectra (continuous and emission line) X-ray tube

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Physics of Radiography Vicki@sciencewow.co.uk www.sciencewow.co.uk

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  1. Physics of Radiography • Vicki@sciencewow.co.uk • www.sciencewow.co.uk

  2. Physics of Radiography • Structure of an atom • Wave theory • Quantum theory of electromagnetic radiation • Physical properties of X-rays • X-ray spectra (continuous and emission line) • X-ray tube • Types of X-ray tube and power supplies • Compton scattering • Absorption process – matter & materials • Dosimetry

  3. Physics of Radiography • Structure of an atom • Properties of sub-atomic particles • Structure of atom • Energy levels • Electron configuration

  4. Physics of Radiography • Wave theory • Wave terminology • Wave equation to calculate frequency and wavelength

  5. Physics of Radiography • Quantum theory of electromagnetic radiation • Quantisation of energy • The photon • Wave particle duality

  6. Physics of Radiography • Physical properties of X-rays • X-ray photon energies • Frequency & wavelength of X-rays

  7. Physics of Radiography • X-ray spectra (continuous and emission line) • Electronic transitions • Line and continuous spectra • Effect on spectra of varying accelerating voltage • Maximum photon energy

  8. Physics of Radiography • X-ray tube • Diagram of the x-ray tube • Calculate electron kinetic energy (J) • Convert J to eV

  9. Physics of Radiography • Types of X-ray tube and power supplies • Power supply for electron tube • High anode-cathode voltage • Effect of high cathode current

  10. Physics of Radiography • Compton scattering • Simple scattering • Compton scattering • Photoelectric effect • Pair production

  11. Physics of Radiography • Absorption process – matter & materials • Material thickness • Different materials • Attenuation • Photographic image • Image quality • Image intensifiers

  12. Physics of Radiography • Dosimetry • Absorbed dose, dose equivalent, effective dose • Units • ALARA principle

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