ARRT review covering equipment operation and quality control
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| Bremsstrahlung radiation comprises __%-__% of the x-ray beam | 70%-90%
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| A high speed electron encounters a tungsten atom within the anode and ejects a K shell electron leaving a vacancy in that shell | Characteristic Radiation
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| the distance between two consecutive wave crests | wavelength
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| the number of cycles per second, its unit of measurement is the hertz (Hz) | frequency
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| Shorter wavelength is associated with: | higher frequency, higher energy, increased ionizing potential
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| a relatively low-energy (low kv) x-ray photon uses all its energy to eject an inner shell electron, leaving orbital vacancy. an electron from the shell above drops down to fill the vacancy | photoelectric effect
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| a fairly high energy x-ray photon ejects an outer shell electron | compton scatter
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| converts mechanical energy to electrical energy | generator
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| converts electrical energy to mechanical energy | motor
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| the x-ray tube operates most efficiently on ______ current. | unidirectional
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| basic components of the x-ray tube: | anode, cathode, glass envelope
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| The anode is positive or negative? | positive
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| The cathode is positive or negative? | negative
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| The glass envelope acts as a_______. | vacuum
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| Tungsten is usually chosen as target material because of its high ______ _______, high ______ _______, and thermal ________. | atomic number, melting point, conductivity
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| most x-ray tubes have __ filaments | two
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| the larger the matrix size, the ______ the image | better
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| anything that interferes with visualization of the image | noise
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| the x-ray circuit has three major portions: | the primary side (low voltage), the filament circuit, and the secondary side (high voltage)
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| terminates the exposure should the AEC fail, protecting the patient from excessive exposure, prolonging the life of the x-ray tube | backup timer
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