Ultrasound Modalities in Medicine
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Questions and Answers

What are the two modalities of ultrasound mentioned in the text?

  • Static energy and dynamic energy
  • Continuous energy and pulsed energy (correct)
  • Single energy and multiple energy
  • Fast energy and slow energy
  • Which ultrasound modality uses a steady sound source for applications like fetal heart beat detectors?

  • Continuous sound energy (correct)
  • Static sound energy
  • Pulsed sound energy
  • Dynamic sound energy
  • What type of ultrasound uses a quick blip of sound followed by a relatively long pause?

  • Continuous sound energy
  • Variable sound energy
  • Dynamic sound energy
  • Pulsed sound energy (correct)
  • How is a two-dimensional image created in ultrasound imaging?

    <p>By electronic processing of returning sounds</p> Signup and view all the answers

    What generates the electrical pulses for ultrasound transducers in conventional imaging?

    <p>Pulse generator</p> Signup and view all the answers

    At what rate are pulses produced in conventional ultrasound imaging?

    <p>~1,000 pulses per second</p> Signup and view all the answers

    What type of waves does ultrasound rely on to image the body?

    <p>High-frequency waves</p> Signup and view all the answers

    What type of waves are ultrasound waves in the body?

    <p>Longitudinal waves</p> Signup and view all the answers

    What is the bandwidth of a typical ultrasound pulse dominated by?

    <p>Center frequency</p> Signup and view all the answers

    What does Doppler ultrasound evaluate through different structures?

    <p>Blood flow</p> Signup and view all the answers

    What is the function of a pulse generator in ultrasound imaging?

    <p>Producing the electrical pulses applied to the transducer</p> Signup and view all the answers

    How does continuous sound energy differ from pulsed sound energy in ultrasound?

    <p>Pulsed sound energy has a relatively long pause after each burst</p> Signup and view all the answers

    What is the main purpose of Doppler ultrasound in medical applications?

    <p>Evaluating blood flow through different structures</p> Signup and view all the answers

    Why does ultrasound rely on high-frequency sounds to image the body?

    <p>To produce longitudinal waves for imaging</p> Signup and view all the answers

    How does electronic processing help in creating a two-dimensional image in ultrasound imaging?

    <p>By processing the returning sounds from the target</p> Signup and view all the answers

    What property of a sound wave is determined by the rate at which tissue structures vibrate back and forth?

    <p>Frequency</p> Signup and view all the answers

    In ultrasound generation, what does the term 'pulse-echo technique' refer to?

    <p>Emitting only a few cycles of pulses at a time</p> Signup and view all the answers

    What does the wavelength of an ultrasound wave represent?

    <p>The distance a compression wave moves forward</p> Signup and view all the answers

    Which mode of ultrasound generation involves producing successive compressions and rarefactions through alternate current voltage?

    <p>Continuous Wave Mode</p> Signup and view all the answers

    How are tissue positioning and identification achieved in ultrasound imaging using the pulse-echo technique?

    <p>By detecting and analyzing pulse echoes</p> Signup and view all the answers

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