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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amount of energy absorbed per mass unit | show 🗑
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glass and aluminum in the housing assembly comprise this | show 🗑
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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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show | direct transmission
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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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show | small angle scatter
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show | the same as the incident photon
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undesirable, additional density. Result of scatter | show 🗑
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energy range most likely to produce coherent scattering | show 🗑
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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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what kind of interaction is most likely to occur between 60-90 kVp | show 🗑
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show | a photoelectron
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what are the byproducts of coherent scattering? | show 🗑
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show | Compton scatter
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What kind of interaction is likely to occur between 1.022 MeV - 50 MeV | show 🗑
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show | Photodisintegration
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show | coherent scatter, compton scatter, photoelectric absorption, pair production, photodisintegration
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show | compton scatter & photoelectric absorption
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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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show | incoherent, inelastic, modified scattering
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show | compton scattering
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interaction when an outer shell electron is ejected from its shell | show 🗑
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show | 35 keV
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show | photoelectric absorption
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type of interaction where incident photon surrenders all its energy to orbital electron & ceases to exist | show 🗑
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show | photoelectron
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show | increases / does
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show | characteristic photon or characteristic x-ray (fluorescent radiation)
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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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show | fluorescent yeild
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Auger effect more likely in materials with higher or lower Z# | show 🗑
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show | lower
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byproducts of photoelectric absorption | show 🗑
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show | Increases markedly as energy of incident photon increases, and Z# decreases
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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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body part thickness factor | show 🗑
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show | greater
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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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show | to distinguish between structures with similar atomic numbers or mass densities
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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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show | increased
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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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unstable nuclei used in PET imaging | show 🗑
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interaction that occurs above 10MeV in high energy radiation therapy treatment | show 🗑
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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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