Bushong (9th; Ch 9)
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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| A measure of the number of ion pairs produced in air by a quantity of x-rays | show 🗑
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| show | x-ray quantity
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| show | 5 mR/mAs (50 μGya) at 100cm SID
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| show | roentgens (R), mGya, mR/s, mR/min, or mR/mAs
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| X-ray quantity or intensity; measured in roentgens (R) | show 🗑
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| radiation ________ = x-ray _________ = _____ quantity | show 🗑
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| x-ray ________ is ________ proportional to the mAs | show 🗑
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| a measure of the total number of electrons that travel from cathode to anode to produce x-rays | show 🗑
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| show | Coulomb (C)
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| Formula for x-ray quantity & mAs | show 🗑
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| Formula for x-ray quality & kVp | show 🗑
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| X-ray ________ is ____________ to the kVp² | show 🗑
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| mC = ___ | show 🗑
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| show | 15%; reduced
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| X-ray quantity is _________ proportional to the square of the ________ from the ______ | show 🗑
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| X-ray intensity varies _________ with the ______ of the ________ from the x-ray tube ______ | show 🗑
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| Formula for x-ray quantity & distance | show 🗑
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| Square Law | show 🗑
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| When SID is increased, ___ must be increased by ____ to maintain constant exposure to the IR | show 🗑
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| Purpose of filters | show 🗑
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| show | 1-5mm Al
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| show | filtration; patient dose
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| show | ↓ image contrast
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| show | ↓ image contrast
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| increases the number of high energy x-rays in the beam by removing the lower-energy nonpenetrating x-rays | show 🗑
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| one description of the ability of x-rays to penetrate deeper in tissue | show 🗑
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| the penetrability of an x-ray beam | show 🗑
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| show | low; high
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| show | attenuation
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| show | Half-value layer (HVL) of an x-ray beam
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| show | 3-5mm Al, or
3-6cm soft tissue
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| show | HVL
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| X-ray beam quality can be identified by _______ or __________, but ___ is most appropriate | show 🗑
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| Atomic number of aluminum (AL) | show 🗑
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| show | 64
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| show | 67
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| Atomic number of copper (Cu) | show 🗑
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| show | 50
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| Increasing the ___ peak _________ the quality of an x-ray beam | show 🗑
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| show | 2.5mm Al
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| Increasing filtration increases the _______ of an x-ray beam | show 🗑
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| Atomic number of Beryllium | show 🗑
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| show | quality; quantity
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| show | window
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| reason why window is thin | show 🗑
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| type of filtration provided by the glass or metal enclosure of an x-ray tube; filters emitted x-ray beam | show 🗑
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| show | 0.5mm Al equivalent
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| type of special purpose tube with very thin window | show 🗑
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| show | 0.1mm Al; sometimes made of Beryllium rather than glass
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| Added filtration results in ↑ ___ | show 🗑
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| Added filtration resulting from the silver surface of the mirror in the collimator | show 🗑
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| show | compensating filter
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| show | "bow-tie"-shaped filters
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| type of filter sometimes used in chest radiography; thin region over mediastinum & thick portions lateral over lung fields | show 🗑
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| show | conic filters
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| type of filter that compensates for OD variation of body parts that vary considerably in thickness | show 🗑
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| show | step-wedge filter
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