equipment-DENH
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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| what is voltage? | force that drives electric current through circuit; affects contrast
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| what is the basic unit of voltage? | volt = kilovolt
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| what occurs if KVP(voltage) is increased? | voltage increase = increase speed = decrease size/wavelength = increase penetration
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| what is ampere? | amount of electrical current flowing through circuit
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| what is ampere determined by? | film speed, exposure time, and PID
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| what and how is ampere controlled? | controls quantity and is controlled by MA
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| What do transformers do? | increase (step-up) or decrease (step down) alternating current and voltage
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| what is the difference between low and high voltage circuits? | low (step down) heats tube filament to incandescence and high (step up) activates electrons at heated filament toward anode(target)
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| what is electromagnetic radiation? | wire moved through magnetic field, electrons in wire induced to flow
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| are the wavelengths of x-rays mono or polychromatic? | polychromatic = waves of more than one frequency and wavelength
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| what is intensity of x-ray affected by? | KVP, MA, exposure time and FFD
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| what happens if MA and KVP are increased? | increases intensity
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| increase in exposure time? | increases intensity
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| increase FFD? | decreases intensity (due to divergent beam)
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| what occurs as move AWAY from central ray? | divergency of x-rays increases
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| what is the inverse square law? | intensity is less at increasing distances from source; as distance doubles, intensity quadruples = distance increase, intensity decrease
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| what is electricity? | flow of electrons produced by electrical differences
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| what is the difference between direct and alternating current? | direct-flows in one direction; alternating-flows in both directions
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| what does KVP refer to? | kilovolt peak
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| what are factors determine KVP? | object density or type of contrast desired
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| THE "24" ON THE TIMER DIAL STANDS FOR? | 24 IMPULSES/SEC
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| SCATTER RADIATION FROM PID IS PREVENTED BY? | LEAD LINING
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| THE COMPONENT THAT AUTOMATICALY ADJUSTS FLUCTUATION IN VOLTAGE IS CALLED? | AUTOTRANSFORMER
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| X-RAYS OF ____ WAVELENGTH ARE MOST LIKELY TO RESULT IN SECONDARY RADIATION? | LONG
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