Sherer Ch2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | absorbed dose (D)
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| show | permanent inherent filtration
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| show | primary radiation
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| show | 1/3 the kVp selected
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| reduction of the number of primary photons in the x-ray beam through absorption & scatter as the beam passes through the patient | show 🗑
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| x-ray photons that traverse the patient without interacting | show 🗑
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| show | indirect transmission
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| the optimal image is formed when only _____ _____ photons reach the IR | show 🗑
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| show | primary photons
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| photons that emerge from the tissue and strike the radiographic IR | show 🗑
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| show | attenuation
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| degrades the appearance of a radiograph by blurring the sharp outlines of dense structures. | show 🗑
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| approximate energy level of small angle scatter photons | show 🗑
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| undesirable, additional density. Result of scatter | show 🗑
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| show | 1-50 kVp
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| what happens to x-ray photons that are coherently scattered | show 🗑
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| what energy range is most likely to yield photoelectric absorption | show 🗑
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| show | K or L shell electrons
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| show | Compton scatter
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| show | a photoelectron
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| what are the byproducts of coherent scattering? | show 🗑
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| what kind of interaction is most likely to occur between 200 kVp- 2 Mev | show 🗑
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| show | Pair Production
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| What kind of interactions only occur at energy levels greater than 10 MeV | show 🗑
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| what are the 5 types of interactions? | show 🗑
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| what are the only 2 types of interactions important in diagnostic radiography | show 🗑
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| What are the other names for Coherent scattering | show 🗑
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| relatively simple process that results in no loss of energy as x-rays scatter | show 🗑
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| Coherent scattering takes place at mostly what energy level? | show 🗑
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| other names for compton scattering | show 🗑
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| show | compton scattering
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| show | compton scatterinc
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| energy level where probability of compton scatter is equal to probability of photoelectric interactions | show 🗑
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| show | photoelectric absorption
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| show | photoelectric absorption
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| show | photoelectron
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| photoelectric absorption ____ patient dose & _____ contribute to biological damage | show 🗑
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| energy lost in process of photoelectric absorption is released as | show 🗑
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| show | Auger effect
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| Auger effect is said to be a radiationless effect why? | show 🗑
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| # of x-rays emitted per inner-shell vacancy | show 🗑
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| show | higher
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| Fluorescent Yield higher or lower in materials with high Z# | show 🗑
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| byproducts of photoelectric absorption | show 🗑
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| probability of occurrence of photoelectric absorption | show 🗑
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| show | effective atomic number
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| show | influences attenuation. Density increase leads to corresponding increase in photon absorption. Z# & density play role in attenuation
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| show | appx. linear, double thick = double absorption
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| less attenuation leads to ______ density | show 🗑
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| greater amt of photoelectric absorption, the ___ the contrast in an image between adjacent structures for different Z# | show 🗑
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| show | they increase
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| why are contrast agents used | show 🗑
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| what are common positive contrast agents and why? | show 🗑
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| Administration of contrast media can lead to _____ patient dose | show 🗑
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| show | Pair Production
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| negative contrast results in what kind of density on radiograph | show 🗑
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| what happens in pair production | show 🗑
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| probability of pair production interactions become significant at what energy level? | show 🗑
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| show | positron decay
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| show | positron
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| show | Flourine-18, carbon-11, nitrogen-13
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| show | photodisintegration
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| high energy photon collides with nucleus, which absorbs all the photons energy & nucleus emits neutron, proton, deutron, or alpha particle | show 🗑
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Created by:
jen.studer
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