Radiology Best Answer

87 Questions | Total Attempts: 1003

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Radiology Quizzes & Trivia

Questions and Answers
  • 1. 
    The penetrating power of xrays depend on
    • A. 

      Kvp

    • B. 

      Ma

    • C. 

      Film speed

    • D. 

      Focal film distance

  • 2. 
    The size of the collimated beam for intraoral radiology measured at the patient skin is
    • A. 

      1.5 to 1.75 inches

    • B. 

      2.0 to 2.25 inches

    • C. 

      2.75 to 3.00 inches

    • D. 

      3.25 to 3.50 inches

  • 3. 
    Filtration of the xray beam protects the patient by
    • A. 

      Eliminating all radiation from the xray head

    • B. 

      Eliminating weak wavelength xrays from the x ray beam

    • C. 

      Eliminating short wavelength x rays from the xray beam

    • D. 

      Decreasing exposure time

  • 4. 
    The most penetrating xrays have
    • A. 

      Low frequencies

    • B. 

      Soft rays

    • C. 

      Long wavelengths

    • D. 

      Long wavelengths

    • E. 

      Short wavelengths

  • 5. 
    The x ray which is at the center of the primary beam is called the
    • A. 

      Cathode ray

    • B. 

      Secondary ray

    • C. 

      Restricted beam

    • D. 

      Central ray

  • 6. 
    The housing of the xray tube is
    • A. 

      Copper

    • B. 

      Plastic

    • C. 

      Tungsten

    • D. 

      Glass

  • 7. 
    As the target film distance is increased there is
    • A. 

      More chance of elongation

    • B. 

      More chance of overlapping

    • C. 

      More chance of foreshortening

    • D. 

      Less distortion

  • 8. 
    Overlapping is a result of
    • A. 

      Incorrect vertical angulation

    • B. 

      Incorrect horizontal angulation

    • C. 

      Excessive bending of the film

    • D. 

      All of the above

  • 9. 
    After a film is exposed, the target film distance is doubled. the exposure time necessary to obtain a second film of equal density to the first film is
    • A. 

      The same as the first film

    • B. 

      Twofold

    • C. 

      Threefold

    • D. 

      Fourfold

  • 10. 
    Wich cells are the most sensitive to xrays?
    • A. 

      Muscle

    • B. 

      Nerve

    • C. 

      Sperm

    • D. 

      Epithelial

  • 11. 
    Which cells are the least sensitive to x rays?
    • A. 

      Ova

    • B. 

      Blood

    • C. 

      Sperm

    • D. 

      Nerve

  • 12. 
    The first sign of x ray dermatitis is
    • A. 

      Loss of hair

    • B. 

      Purulent exudate

    • C. 

      Erythema

    • D. 

      Pain

  • 13. 
    Scatter radiation is a type of
    • A. 

      Secondary radiation

    • B. 

      Primary radiation

    • C. 

      Stray radiation

    • D. 

      None of the above

  • 14. 
    The lead foil in the xray film packet is used to
    • A. 

      Stop unused radiation

    • B. 

      Tell the front of the film from the back

    • C. 

      Prevent film fogging

    • D. 

      Decrease operator's radiation exposure

  • 15. 
    The quality or penetrating power of secondary radiation is
    • A. 

      More than that of primary radiation

    • B. 

      Less than that of primary radiation

    • C. 

      The same as that of primary radiation

    • D. 

      Unrelated to that of primary radiation

  • 16. 
    If a radiograph remains in the developing solution too long the film will be
    • A. 

      Lighter

    • B. 

      Darker

    • C. 

      Lighter only if the temperature is increased

    • D. 

      Unaffected because time is not a factor

  • 17. 
    Film fog may occur if there is
    • A. 

      A light leak in the darkroom

    • B. 

      Bending of the film

    • C. 

      Reversal of the film

    • D. 

      Extremely thick bone

  • 18. 
    Films not fixed for a long enough period of time will appear
    • A. 

      To have black lines running through them

    • B. 

      To be brittle

    • C. 

      To have a brown tint

    • D. 

      White

  • 19. 
    Film is washed after removing it from the developing solution to
    • A. 

      Remove any debris on the film

    • B. 

      Speed up the developing process

    • C. 

      Stop the developing process

    • D. 

      Remove the precipitated silver salts

  • 20. 
    In order for the developing chemicals to work, the solution must be
    • A. 

      Acidic

    • B. 

      Neutral

    • C. 

      Basic

  • 21. 
    Fixing the film
    • A. 

      Removes the unaffected silver salts

    • B. 

      Removes the affected silver salts

    • C. 

      Softens the film

    • D. 

      Peels the emulsion from the film base

  • 22. 
    The fixing solution is
    • A. 

      Acidic

    • B. 

      Neutral

    • C. 

      Basic

    • D. 

      First basic then neutral after dilution

  • 23. 
    Reticulation is
    • A. 

      Cracking of the film emulsion

    • B. 

      An electric charge in the developing solution

    • C. 

      A latent image

    • D. 

      Due to excess radiation

  • 24. 
    The optimum time temperature relationship for processing dental radiographs is
    • A. 

      74 f for 4 1/2 minutes

    • B. 

      68 F for 6 minutes

    • C. 

      50 F for 5 minutes

    • D. 

      Varied according to manufactures specification

  • 25. 
    The panoramic radiograph is not diagnostic for
    • A. 

      Caries detection

    • B. 

      General survey

    • C. 

      Confirmation of mandibular fractures

    • D. 

      Detection of impacted wisdom teeth