Carlton Adler
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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| Which condition is needed to produce an x ray? | 1. a source of electrons 2. a vacuum 3. a large potential difference
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| The function of the cathode is to produce | a thermionic cloud
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| Each of the following is a part of the cathode addembly except the | stator
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| Each of the following is a material of choice for the filament except | Copper
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| Filament materials are chosen for their | high melting points
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| Which of the following would affect the production of a thermionic cloud? | filament diameter, length, and temperature
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| A filament may break due to | vaporization
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| Driving the thermionic cloud from the cathode to the anode requires | a large potential difference
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| The focusing cup has a/an ____ charge | negative
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| X ray photon production occurs at the | anode
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| Tungsten is the metal of choice for the source of x ray photons because of its | high atomic number
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| Pitting of the anode commonly occurs | with extended use
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| Melting of the anode commonly occurs | when the stator fails and the rotor ceases to turn
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| The exact point in the x ray unit where photons are created is | focal spot
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| The physical area of the focal tract affected by the electron beam is the | actual focal spot
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| The area of the focal spot that is projected out of the tube toward the object being radiographed is the | effected focal spot
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| The actual focal spot is controlled by the | length of the filament
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| The only portion of the anode assembly placed outside the vacuum of the envelope is the | stator
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| The function of the stator and rotor assembly is to | rotate the anode
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| The rotor is located ___ the stator and ____ the envelope | inside, inside
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| Insulation of the high voltage components of the tube and absorption of the heat produced by x ray production is achieved through the use of | dielectric oil
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| Fluoroscopy is a ___ radiograph examination | dynamic, static, diagnostic
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| Fluoroscopy is commonly used for observation of | the heart, GI tract, and surgical procedure
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| The fluoroscopic xray tube and image receptor are mounted on a | C Arm
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| Fluoroscopic mA range is commonly ___ mA | 0.5 - 5.0
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| During fluoroscopy, the SOD cannot be less than __ inches | 20
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| During fluoroscopic image intensification, the primary x ray beam exits the patient and strikes the ___ of the image intensifier | input screen
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| The input screen absorbs __ and emits __ | x ray photons, light photons
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| The photocathode absords __ and emits __ | light photons, electrons
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| Electrostatic lenses are used to accelerate and focus | electrons
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| The output screen absorbs __ and emits __ | electrons, light photons
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| The input screen is __ in shape | concave
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| The shape of the input screen helps to control | distortion
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| Photoemissive materials absorb __ and emit __ | light photons, electrons
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| Electrostatic lenses are actually | charge electrodes
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| The greater the voltage supplied to the electrostatic lenses, the __ the acceleration and the __ the focal point to the input screen | greater, closer
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| The edge distortion problem in image intensification tubes called | vignetting
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| The most common solution for quantum mottle is to | increase the fluoro tube mA
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| The standard size cassette for spot filming is | 9x9
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| Digitization of the fluoroscopic image permits | storage on a CD, transfer via internet, hard copy printing via laser disc
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