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15 Cards in this Set
- Front
- Back
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variable that controls quality of xray beam
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kVp
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variable that controls quantity of xray beam
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mA
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the electrical current that heats the filament is measured in _______
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milliamperes
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exposure time
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period during which the xrays are permitted to leave the xray tube
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2 advantages to using high mA settings
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1- allows for shorter time settings
2- greater amount of xrays are produced |
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the equation used to determine mAs
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mA x time[in seconds] = mAs
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kVp
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- kilovoltage peak
- related to the penetrating power of the xrays |
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the _____ the kV, ______ the electrons are accelerated
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higher, faster
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higher kVp settings produce _______ beams & allow for ______ mA settings
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more-penetrating, lower
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Santes' rule equation
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(2 x thickness) + 40 = kVp
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Source-image distance [SID]
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the distance b/t the source of the xrays & the image receptor/film
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as SID is decreased, the xray intensity is ______
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increased
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inverse square law
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the intensity of the beam varies inversely according to the square of the distance
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the most common SID in vet. med. ranges from ____ to _____ cm [____ to ___ inches]
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90-100cm [36-40 inches]
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mAs control the _______ _____ of xrays and the kVp controls the _____ _____ of the xrays
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total number, penetrating power
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