Equipment Operation and Quality ControlIIII imaging equipment

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McCrae
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296061
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Equipment Operation and Quality ControlIIII imaging equipment
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2015-02-17 01:25:03
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Equipment Operation Quality ControlIIII imaging equipment
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Equipment Operation and Quality ControlIIII imaging equipment
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  1. When the radiographer selects kilovoltage on the control panel, which device is adjusted?




     
    Step-up transformer 



     
    Autotransformer 



     
    Filament circuit 



     
    Rectifier circuit
    •  
    •  
    • Autotransformer
  2. The autotransformer makes these changes possible. When kilovoltage is selected on the control panel, the radiographer actually is adjusting the_______ and selecting the amount of voltage to send to the high-voltage transformer to be stepped up (to kilovoltage). 
     autotransformer
  3. The ____ circuit supplies the proper current and voltage to the x-ray tube filament for proper thermionic emission
    filament
  4. The _____circuit is responsible for changing AC to unidirectional current. 
    rectifier 
  5. Which of the following x-ray circuit devices operate(s) on the principle of mutual induction?

    1. High-voltage transformer

    2. Filament transformer

    3. Autotransformer






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 and 2 only
  6. Which of the following will improve the spatial resolution of image-intensified images?

    1. A very thin coating of cesium iodide on the input phosphor

    2. A smaller-diameter input screen

    3. Increased total brightness gain






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 and 2 only
  7. as the phosphor layer is made thinner, recorded detail _____.
    increases
  8. All the following statements regarding three-phase current are true except




     
    three-phase current is constant-potential direct current. 



     
    three-phase equipment produces more x-rays per milliampere-second. 



     
    three-phase equipment produces higher-average-energy x-rays than single-phase equipment. 



     
    the three-phase waveform has less ripple than the single-phase waveform.
    •  
    •  
    • three-phase current is constant-potential direct current.
  9. X-ray tube life may be extended by

    1. using low-milliampere-seconds/high- kilovoltage exposure factors

    2. avoiding lengthy anode rotation

    3. avoiding exposures to a cold anode






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1, 2, and 3
  10. All of the following can permanently record the images in conventional fluoroscopy, except a:




     
    Cassette-loaded spot film 



     
    Flat panel image receptor 



     
    Photospot camera film 



     
    Cine film
    •  
    •  
    • Flat panel image receptor
  11. Which of the following contribute(s) to inherent filtration?

    1. X-ray tube glass envelope

    2. X-ray tube port window

    3. Aluminum between the tube housing and the collimator






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 and 2 only
  12. Delivery of large exposures to a cold anode or the use of exposures exceeding tube limitation can result in

    1. increased tube output

    2. cracking of the anode

    3. rotor-bearing damage






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 2 and 3 only
  13. To maintain image clarity, the path of electron flow from photocathode to output phosphor is controlled by




     
    the accelerating anode 



     
    electrostatic lenses 



     
    the vacuum glass envelope 



     
    the input phosphor
    •  
    •  
    • electrostatic lenses
  14. Which of the following is a device that can be used in lieu of an image intensifier/charge-coupled device combination in digital fluoroscopy?




     
    Charge-coupled device 



     
    Flat panel image receptor 



     
    photometer 



     
    photomultiplier tube
    •  
    •  
    • Flat panel image receptor
  15. Which of the following would be considered an advantage of using photospot camera film instead of cassette-loaded spot film to record conventional fluoroscopic images?




     
    Reduced patient dosage 



     
    Larger anatomical image size 



     
    Reduced rate of exposures 



     
    No need for processing chemicals
    •  
    •  
    • Reduced patient dosage
  16. In conventional fluoroscopy, all of the following are methods of permanently recording the images, except:




     
    Cassette-loaded spot film 



     
    Photospot camera film 



     
    Cine film 



     
    Flat panel image receptor
    d
  17. The filtering effect of the x-ray tube's glass envelope and its oil coolant are referred to collectively as




     
    inherent filtration 



     
    added filtration 



     
    compensating filtration 



     
    port filtration
    •  
    •  
    • inherent filtration
  18. The device used to change alternating current to unidirectional current is




     
    a capacitor 



     
    a solid-state diode 



     
    a transformer 



     
    a generator
    •  
    •  
    • a solid-state diode
  19. As the CR laser scanner/reader recognizes the phosphostimulated luminescence (PSL) released by the PSP storage plate, it constructs a graphic representation of pixel value distribution called a




     
    processing algorithm 



     
    histogram 



     
    lookup table 



     
    exposure index
    •  
    •  
    • histogram
  20. A parallel-plate ionization chamber receives a particular charge as x-ray photons travel through it. This is the operating principle of which of the following devices?




     
    AEC 



     
    Image intensifier 



     
    Cine-film camera 



     
    Spot-film camera
    •  
    •  
    • AEC
  21. Component part(s) of x-ray film include which of the following?

    1. Phosphor layer

    2. Gelatin emulsion

    3. Adhesive layer






     
    1 only 



     
    1 and 3 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 2 and 3 only
  22. A type of laser used in CR scanners is




     
    Cesium-iodide 



     
    Helium-halide 



     
    Barium-fluorohalide 



     
    Helium-neon
    •  
    •  
    • Helium-neon
  23. ______ is used in the scintillation layer of an indirect flat-panel digital detector (FPD). 

















    •  
      Cesium-iodide 



       
      Helium-halide 



       
      Barium-fluorohalide 



       
      Helium-neon












        •  














        •  







        • Helium-neon










    a
  24. is used in the scintillation layer of an indirect flat-panel digital detector (FPD). 















































              •  
                Cesium-iodide 



                 
                Helium-halide 



                 
                Barium-fluorohalide 



                 
                Helium-neon






































































































                            •  






































































































































                            •  



































































                            • Helium-neon

































































    a
  25. _______is not used in either computed or digital radiography. Barium fluorohalide

    A)
     Cesium-iodide 
    B)
     Helium halide
    C)
     Barium-fluorohalide 
    D)
     Helium-neon 
    b

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