Equipment Operation and Quality Control 1.2 Imaging equipment III

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McCrae
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295906
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Equipment Operation and Quality Control 1.2 Imaging equipment III
Updated:
2015-02-15 13:58:56
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Equipment Operation Quality Control Imaging equipment II
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Rad Review Easy
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Rad Review Easy
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  1. Which of the following devices converts electrical energy to mechanical energy?




     
    Motor 



     
    Generator 



     
    Stator 



     
    Rotor
    •  
    •  
    • Motor
  2. The part of a CT imaging system made of thousands of solid-state photodiodes is the




     
    gantry. 



     
    detector array. 



     
    collimator assembly. 



     
    x-ray tube.
    •  
    •  
    • detector array.
  3. Which of the following is/are components of the secondary, or high voltage, side of the x-ray circuit?

    1. Rectification system

    2. Autotransformer

    3. kV meter






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 only
  4. If the primary coil of the high-voltage transformer is supplied by 220 V and has 200 turns, and the secondary coil has 100,000 turns, what is the voltage induced in the secondary coil?




     
    40 kV 



     
    110 kV 



     
    40 V 



     
    110 V
    B
  5. All the following x-ray circuit devices are located between the incoming power supply and the primary coil of the high-voltage transformer except




     
    the timer 



     
    the kilovoltage meter 



     
    the milliamperage meter 



     
    the autotransformer
    •  
    •  
    • the milliamperage meter
  6. The timer, autotransformer, and (prereading) kilovoltage meter are all located in the ______ circuit. 
    low-voltage
  7. What type of x-ray imaging uses an area beam and a photostimulable phosphor as the IR?




     
    Traditional radiography 



     
    Computed radiography 



     
    Digital radiography 



     
    Cineradiography
    •  
    •  
    • Computed radiography
  8. If a radiograph, made using AEC, is overexposed because an exposure shorter than the minimum response time was required, the radiographer generally should




     
    decrease the milliamperage 



     
    use the minus density 



     
    use the plus density 



     
    decrease the kilovoltage
    •  
    •  
    • decrease the milliamperage
  9. Which part of an induction motor is located outside the x-ray tube glass envelope?




     
    Filament 



     
    Focusing cup 



     
    Stator 



     
    Rotor
    •  
    •  
    • Stator
  10. All of the following statements regarding dual x-ray absorptiometry are true,except















    1. radiation dose is considerable.
    2. two x-ray photon energies are used.
    3. photon attenuation by bone is calculated.






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 only
  11. All of the following are equipment options that may be used to record the anatomical image in mobile radiography, except:




     
    Tethered flat panel 



     
    Remote (wireless) digital flat panel array 



     
    Scanned projection radiography (SPR) 



     
    Conventional radiographic film
    •  
    •  
    • Scanned projection radiography (SPR)
  12. What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus?




     
    Output phosphor 



     
    Beam splitter 



     
    Spot-film changer 



     
    Automatic brightness control
    •  
    •  
    • Beam splitter
  13. Use of a portion of the input phosphor during fluoroscopy, rather than the entire input phosphor, will result in
    1. a larger field of view (FOV).
    2. a magnified image.
    3. improved spatial resolution.





     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 2 and 3 only
  14. Grid interspace material can be made of

    1. plastic

    2. lead

    3. aluminum






     
    1 only 



     
    1 and 2 only 



     
    1 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 and 3 only
  15. If the primary coil of a high-voltage transformer is supplied by 220 V and has 400 turns and the secondary coil has 100,000 turns, what is the voltage induced in the secondary coil?




     
    80 kV 



     
    55 kV 



     
    80 V 



     
    55 V
    •  
    •  
    • 55 kV
  16. If 92 kV and 15 mAs were used for a particular abdominal exposure with single-phase equipment, what milliampere-seconds value would be required to produce a similar radiograph with three-phase, 12-pulse equipment?




     

     
    36 



     

     
    24 



     

     
    10 

     

     
    7.5
    •  
    •  With three-phase, 12-pulse equipment, the original milliampere-seconds would be cut in half (one-half of 15 mAs = 7.5).
    • 7.5
  17. Bone densitometry is often performed to

    1. measure degree of bone (de) mineralization

    2. evaluate the results of osteoporosis treatment/therapy

    3. evaluate the condition of soft tissue adjacent to bone






     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 and 2 only
  18. Which of the following waveforms has the lowest percentage voltage ripple?




     
    Single-phase 



     
    Three-phase, six-pulse 



     
    Three-phase, 12-pulse 



     
    High-frequency
    •  
    •  
    • High-frequency
  19. Recently, dual-sided reading technology has become available in more modern CR readers, in which two sets of photodetectors are used to capture light released from the front and back sides of the phosphor storage plate, or PSP (photostimulable phosphor). This technology enables improved:




     
    Slow-scan direction speed 



     
    Modulation transfer function 



     
    Signal-to-noise ratio 



     
    Fast-scan direction speed
    •  
    •  
    • Signal-to-noise ratio
  20. During CR imaging, the latent image present on the PSP is changed to a computerized image by the




     
    PSP 



     
    Scanner–reader 



     
    ADC 



     
    helium–neon laser
    •  
    •  
    • ADC
  21. The purpose of magnification fluoroscopy is to:




     
    Enhance the image in order to facilitate diagnostic interpretation 



     
    Decrease patient dosage 



     
    Decrease fluoroscopy time 



     
    Increase efficiency of X-ray production
    •  
    •  
    • Enhance the image in order to facilitate diagnostic interpretation
  22. Which of the x-ray circuit devices shown in Figure 7–16 operates on the principle of self-induction?

    1. Number 1

    2. Number 2

    3. Number 3










     
    1 only 



     
    1 and 2 only 



     
    2 and 3 only 



     
    1, 2, and 3
    •  
    •  
    • 1 only
  23. what is 2
     The step-up (high-voltage)transformer
  24. what is 3
    secondary coil is number
  25. Which of the illustrations in the figure below depicts the ionization-chamber type of automatic exposure control?






     
    Figure a. 



     
    Figure b. 



     
    Both are ionization-chamber-type AEC. 



     
    Neither is ionization-chamber-type AEC.
    •  
    •  
    • Figure a.
  26. One advantage of a battery-powered mobile radiographic unit is:




     
    It requires less kilovoltage to penetrate the anatomical part of interest 



     
    It produces radiographic images of much better image quality 



     
    It is much lighter than other mobile units 



     
    Electrical power is available to drive itself
    •  
    •  
    • Electrical power is available to drive itself

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