2012 ARRT radiation physics content
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| Half life of Radium-226 | show 🗑
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| Half life of Cesium-137 | show 🗑
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| show | 5.27 years
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| Half life of Iridium-192 | show 🗑
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| show | 59.4 days
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| show | 16.99 days
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| show | 2.7 days
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| show | 3.82 days
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| What are the five ways brachytherapy can be administered? | show 🗑
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| show | process by which an unstable element reaches stability through the release of excess energy in the form of electromagnetic radiation
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| show | alpha decay
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| The result of a high neutron/proton ratio where a neutron is converted into a proton, increasing the atomic number (anti-neutrino) | show 🗑
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| show | Positron Beta decay
Requires 1.02 MeV
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| The amount of energy required to remove an electron from an atom | show 🗑
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| The process when photons interact with a material, giving up their energy, and being removed from the beam | show 🗑
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| Define wave theory | show 🗑
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| What are the properties of Electromagnetic waves? | show 🗑
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| What is the speed of light? | show 🗑
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| What is the inverse square law? | show 🗑
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| show | kVp
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| show | Bremsstralung
Characteristic Interaction
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| What happens during a Bremsstralung interaction? | show 🗑
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| show | The incident electron collides with an inner shell electron of the atom. This leaves an opening in the inner shell which is then filled by an electron in the next shell. A cascade effect occurs. The energy released by each cascade is given off as an x-ray
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| What are the five interactions that occur between photons and matter? | show 🗑
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| show | Coherent scatter
The low energy photon causes the electrons to vibrate and release excess energy in the form of a secondary photon.
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| What is the most common photon interaction with matter? | show 🗑
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| show | Photoelectric
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| show | Photodisintegration
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| Which photon interaction with matter occurs only when the incident photon is at least 1.02 MeV? | show 🗑
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| In pair production, what is the energy of the two resulting photons created? | show 🗑
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| show | Collision (elastic, inelastic)
Radiative
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| An _____ collision is one where the incoming electron gives all its energy to the particle encountered. | show 🗑
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| show | Inelastic
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| show | Heavily charged particles, like protons, will deposit the maximum dose when they are close to being stopped in the material, creating a Bragg peak. We can use this to deposit max dose to the target while reducing dose beyond the target.
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| show | Gray (Gy)
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| show | Gray in air/Air Kerma
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| What is the SI Unit for effective dose? | show 🗑
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| show | Becquerel (Bq)
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| 1 Gy = ? rad | show 🗑
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| show | 1 Sv = 100 rem
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| What is another unit for exposure? | show 🗑
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| show | Time in seconds
Distance in meters
Mass in kilograms
Electrical current in amperes
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| show | 6.0228 x 10^23
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| In a chemical symbol, what do the letters X, Z, and A stand for? | show 🗑
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| show | The outer shell of an atom can have no more than 8 electrons.
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| show | 2n^2, where n is the shell number.
Shells are numbered beginning from the nucleus going outward.
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| What causes ionization? | show 🗑
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| show | 200 keV - 50 MeV
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| show | Tungston
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| show | Bismuth, Lead, Tin, Cadmium
(BLT with Cheese)
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| show | Beam hardening
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