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L05 Interaction
1. RADIATION PROTECTION IN DIAGNOSTIC AND INTERVENTIONAL RADIOLOGY L 5: Interaction of radiation with matter IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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4. Part 5: Interaction of radiation with matter Topic 1: Introduction to the atomic basic structure IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
5. Electromagnetic spectrum 10 4 10 3 10 2 10 1 3 eV 0.001 0.01 0.1 1 10 0.12 keV 100 1.5 Angström keV X and rays UV IR light E 4000 8000 IR : infrared, UV = ultraviolet
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7. Part 5: Interaction of radiation with matter Topic 2: Quantities and units IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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11. Part 5: Interaction of radiation with matter Topic 3: Bremsstrahlung production IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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13. Electrons strike the nucleus N N n(E) E E 1 E 2 E 3 n 1 n 3 n 2 E 1 E 2 E 3 n 1 E 1 n 2 E 2 n 3 E 3 E E max Bremsstrahlung spectrum
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16. Bremsstrahlung spectra dN/dE (spectral density) dN/dE From a “ thin ” target E E 0 E E 0 E 0 = energy of electrons, E = energy of emitted photons From a “ thick ” target
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19. Part 5: Interaction of radiation with matter Topic 4: Characteristic X Rays IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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21. Spectral distribution of characteristic X Rays (II) L K M N O P Energy (eV) 6 5 4 3 2 0 - 20 - 70 - 590 - 2800 - 11000 - 69510 0 10 20 30 40 50 60 70 80 100 80 60 40 20 L L L K 1 K 2 K 2 K 1 (keV)
22. Part 5: Interaction of radiation with matter Topic 5: Primary and secondary ionization IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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25. Part 5: Interaction of radiation with matter Topic 6: Photoelectric effect and Compton scattering IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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30. Part 5: Interaction of radiation with matter Topic 7: Beam attenuation and Half value thickness IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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35. Photon interactions with matter Annihilation photon Incident photons Secondary photons Secondary electrons Scattered photon Compton effect Fluorescence photon (Characteristic radiation) Recoil electron Electron pair E > 1.02 MeV Photoelectron (Photoelectric effect) Non interacting photons (simplified representation)
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37. Part 5: Interaction of radiation with matter Topic 8: Principle of radiological image formation IAEA Training Material on Radiation Protection in Diagnostic and Interventional Radiology
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39. X Ray penetration in human tissues 60 kV - 50 mAs 70 kV - 50 mAs 80 kV - 50 mAs
40. X Ray penetration in human tissues Improvement of image contrast (lung)
41. X Ray penetration in human tissues Improvement of image contrast (bone)
42. X Ray penetration in human tissues 70 kV - 25 mAs 70 kV - 50 mAs 70 kV - 80 mAs
46. X Ray absorption characteristics of iodine, barium and body soft tissue 100 20 30 40 50 60 70 80 90 100 10 1 0.1 Iodine (keV) X Ray ATTENUATION COEFFICIENT (cm 2 g -1 ) Barium Soft Tissue
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48. Contribution of photoelectric and Compton interactions to attenuation of X Rays in water (muscle) 20 40 60 80 100 120 140 10 1.0 0.1 0.01 Total Compton + Coherent Photoelectric (keV) X Ray ATTENUATION COEFFICIENT (cm 2 g -1 )
49. Contribution of photoelectric and Compton interactions to attenuation of X Rays in bone 20 40 60 80 100 120 140 10 1.0 0.1 0.01 Total Compton + Coherent Photoelectric (keV) X Ray ATTENUATION COEFFICIENT (cm 2 g -1 )
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Editor's Notes
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