Ultrasound Beam Formation and Pulsers
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Questions and Answers

What is the primary function of the beam former in ultrasound technology?

  • Applying electronic delays to align the phases of returning echoes (correct)
  • Translating signal information into a data format for 2D image display
  • Performing postprocessing filtering of noise and clutter
  • Generating the electric voltage to produce the acoustic signal

    • What is the purpose of the pulser in an ultrasound machine?

  • To generate the electric voltage to produce the acoustic signal (correct)
  • To perform postprocessing filtering of noise and clutter
  • To translate signal information into a data format for 2D image display
  • To apply electronic delays to align the phases of returning echoes

    • What is the result of the beam former's alignment of phases from individual transducer elements?

  • A filtered signal with reduced noise and clutter
  • A 2D image display on a video monitor
  • An output signal representing the acoustic information from a pulsed ultrasound beam (correct)
  • Electric voltage applied to the piezoelectric elements

    • What is the role of the transducer elements in the beam forming process?

    <p>To receive the echoes returning from the acoustic signal</p> Signup and view all the answers

    What is the purpose of the electronic delays applied by the beam former?

    <p>To align the phases of the echoes returning from individual transducer elements</p> Signup and view all the answers

    What is the relationship between the transducer elements and the output signal in beam forming?

    <p>The output signal is created by summing the realigned signals from all the transducer elements</p> Signup and view all the answers

    What is the purpose of the pulse generator in an ultrasound machine?

    <p>To generate electrical pulses for the transducer</p> Signup and view all the answers

    What is the function of the piezoelectric material in an ultrasound transducer?

    <p>To convert electrical pulses into acoustic energy</p> Signup and view all the answers

    What determines the brightness of a cell in the ultrasound image?

    <p>The strength of the echo</p> Signup and view all the answers

    What type of transducer has piezoelectric crystals set in a line across the transducer face?

    <p>Linear Array</p> Signup and view all the answers

    What is the purpose of the transducer in an ultrasound machine?

    <p>To convert electrical pulses into acoustic energy</p> Signup and view all the answers

    What is an example of a synthetic piezoelectric material?

    <p>Polyvinylidene difluoride (PVDF)</p> Signup and view all the answers

    What is the primary function of the microphone in a hearing aid?

    <p>To convert sound waves into electrical signals</p> Signup and view all the answers

    What is the approximate upper audible limit of human hearing in healthy, young adults?

    <p>20 kHz</p> Signup and view all the answers

    What is the main application of ultrasound devices in medicine?

    <p>Ultrasound imaging or sonography</p> Signup and view all the answers

    What is the primary use of ultrasound in industrial settings?

    <p>To detect invisible flaws in products</p> Signup and view all the answers

    What is the Doppler effect a change in?

    <p>Frequency or wavelength of a wave</p> Signup and view all the answers

    What is the frequency range of ultrasound devices?

    <p>From 20 kHz to several gigahertz</p> Signup and view all the answers

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