Sherer Ch10
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 | diagnostic tube protective housing
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show | useful or primary beam
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show | not to exceed 100 mR/hr when the tube operated at its highest voltage, and measured at 1m
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what type of material routinely used in manufacturing of x-ray table? | show 🗑
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show | within 2% of the indicated SID
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show | collimator
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show | scattered radiation
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x-rays emitted from parts of the tube other than the focal spot | show 🗑
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show | because lead shutters cannot be placed immediately below focal spot
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how far away should the collimator be from the skin to prevent skin sparing | show 🗑
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show | luminance
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primary unit of luminance | show 🗑
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show | aperture diaphragm
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where are beam defining cones routinely used? | show 🗑
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what governs the beam restriction in a cone? | show 🗑
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show | reduce patient absorbed dose & increase average beam energy
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show | inherent filtration
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show | 0.5mm
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show | 1.0mm Al eq
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show | added filtration
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show | 2.5mm Al eq
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show | 1.5mm Al eq
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what is the total filtration required for tubes operating below 50 kVp | show 🗑
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what takes the place of glass in the window of the mammo unit? | show 🗑
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thickness of a designated absorber required to decrease the intensity of the primary beam by 50% its initial value | show 🗑
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how often should HVL be checked? | show 🗑
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consistency in output in radiation intensity for identical generator settings from one individual exposure to subsequent exposures | show 🗑
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what is the acceptable variance for exposure reproducibility? | show 🗑
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show | exposure linearity
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show | 10%
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show | 95%
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show | gadolinium, lanthanum, yttrium
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show | 57-71
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show | conversion more efficient (absorb 5x more than old calcium tungstate), decreased patient dose, less thermal stress on tube, increased tube life
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show | as kVp increases, effective screen speed increases, and patient dose decreases
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show | kVp & screen-film combination
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what material is used in the front of cassettes? | show 🗑
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why was the use of carbon fiber in film cassettes a benefit? | show 🗑
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show | the one furthest from the tube (the back one)
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show | greater uniformity in image and decrease in patient exposure
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what is the SSD requirements for mobile radiography? | show 🗑
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show | to limit the effects of the inverse square falloff of radiation intensity with distance, and lower patient dose
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image produced by a computer representation of an anatomic information | show 🗑
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what kind of retakes will not be eliminated by digital radiography | show 🗑
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show | photomultiplier tube
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show | 200
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show | CR is more sensitive to scatter radiation
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produce the greatest patient radiation exposure rate in diagnostic radiography | show 🗑
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benefits of image intensifier in fluoro | show 🗑
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how much does image intensifier increase overall brightness? | show 🗑
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daytime (cone) vision | show 🗑
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show | scotopic
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what is typical mA for fluoroscopy | show 🗑
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show | CsI
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what is output phosphor made of? | show 🗑
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show | increases with magnification, because auto adjusts for decreased brightness
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show | intermittent or pulse
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show | 75-110 kVp
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show | no less than 15" in stationary, and no less than 12" in mobile
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what is the ideal position of the image intensifier in fluoro (mobile & stationary) | show 🗑
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show | up to 25% decrease in kVp
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what is minimum filtration in fluoro tube? | show 🗑
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how does filtration effect patient dose in fluoro? | show 🗑
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show | 3-4mm Al when kVp range 80-100
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what should be documented for every fluoro procedure? | show 🗑
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show | 10 R per minute @ 12" above, in HLC units, 20R/min
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required protective barrier thickness? | show 🗑
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show | cine
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frame rate fx on patient dose | show 🗑
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typical cine tabletop exposure | show 🗑
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operating mode for fluoro equipment in which exposure rates are substantially higher than those normally allowed in routine procedures, allows visualization of smaller and lower contrast objects | show 🗑
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limitation on fluoro exposure when HLC is present | show 🗑
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show | 20-120 R/min
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FDA recommends note in patient's record if skin dose of what is received? | show 🗑
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Created by:
jen.studer
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