Electrophysical Agents - Ultrasound

54 Questions | Total Attempts: 302

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Ultrasound Quizzes & Trivia

. Physical principles of sound. Different types of waves. Intensity of ultrasound


Questions and Answers
  • 1. 
    The propagation of vibratory motion is known as S__ W__
  • 2. 
    Ultrasound frequency is > __ kHz andTherapeutic ultrasound is btw ___ - ___ Mhz
  • 3. 
    The energy contain in a sound beam decreases as it travel thorough tissues due to s__ and a__.
  • 4. 
    Absorption of sound increases as f___ increaseWhich frequency is most often used for therapeutic application? __ Mhz
  • 5. 
    In sound velocity the more rigid a material is the, the higher/lower sound velocity
  • 6. 
    Wavelength is inversely related to _____wavelength is = to dist btw 2 s__ p__ in the pressure wave
  • 7. 
    The 2 types of waves are L__ T__
  • 8. 
    In human body tissue which type of wave is supported?
  • 9. 
    Sound waves can be produced as c__ or p__
  • 10. 
    Strength of ultrasound beam is determine by _____
  • 11. 
    With greater intensity, temp elevation will be higher or lower
  • 12. 
    Spatial avg intensity is
    • A. 

      Total power output of the applicator divided by the area of applicator face

    • B. 

      Greatest intensity anywhere over the area of the transducer

  • 13. 
    Spatial peak intensity is
    • A. 

      Total power output of the applicator divided by the area of applicator face

    • B. 

      Greatest intensity anywhere over the area of the transducer

  • 14. 
    In pulse mode the sound beam will be at it max or min during the on stage?
  • 15. 
    Spatial Average Temporal Peak Intensity means
    • A. 

      Peak intensity

    • B. 

      Avg intensity over both on & off cycle

  • 16. 
    Spatial Average Temporal Average Intensity means
    • A. 

      Peak intensity

    • B. 

      Avg intensity over both on & off cycle

  • 17. 
    Duty cycle is
    • A. 

      Duration of pulse time (on) / pulse period (on + off)

    • B. 

      Duration of pulse time (off) / pulse period (on + off)

  • 18. 
    The amt of heating depends on SATA or SATP
  • 19. 
    Pulsing is useful when desired effect is thermal or non-thermal such as treatment of a__ s__ t__ injuries
  • 20. 
    The formula for SATA is :  ___ x ___ ___
  • 21. 
    Frequency is # of o__ per s__ and is measured in ?
  • 22. 
    Continuous wave means the wave is ____Pulse mode means intensity is i___ i____
  • 23. 
    Beam Non-uniformity ratio is ratio of peak or avg intensity to peak or avg intensityIs a low value better or worse? Why? (1 word)
  • 24. 
    A crystal that is use in ultrasound eqpt has a property called p__
  • 25. 
    The 2 forms of piezoelectric effect are
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