Medical Imaging History
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Questions and Answers

What is the primary outcome of the absorption of ultrasonic energy?

  • The energy is transformed into heat (correct)
  • The beam is redirected
  • The beam intensity is reduced
  • The frequency of the beam is changed

    • What is the determining factor of the absorption of an ultrasound beam?

  • The temperature of the medium and the wavelength of the beam
  • The frequency of the beam and the viscosity of the medium (correct)
  • The type of tissue and the intensity of the beam
  • The relaxation time of the medium and the type of transducer

    • What is the primary advantage of diagnostic ultrasound?

  • It poses zero risk and provides real-time imaging (correct)
  • It produces high-resolution images
  • It is a low-cost imaging modality
  • It is a non-invasive procedure

    • What is the typical material used in the active elements of ultrasound transducers?

    <p>Piezoelectric ceramic crystals</p> Signup and view all the answers

    What is the function of the transducer in ultrasound imaging?

    <p>To emit and detect ultrasound waves</p> Signup and view all the answers

    What is the primary application of ultrasound-guided needle biopsy?

    <p>To help physicians see the position of a needle</p> Signup and view all the answers

    What is the characteristic of ultrasound waves that makes them useful for imaging soft tissues?

    <p>They have low frequency and high intensity</p> Signup and view all the answers

    What is the result of the interaction between the ultrasound beam and the medium in reflection mode?

    <p>The beam is redirected by the medium</p> Signup and view all the answers

    What is the primary difference between diagnostic ultrasound and x-rays?

    <p>Diagnostic ultrasound poses zero risk</p> Signup and view all the answers

    What is the role of viscosity in the absorption of an ultrasound beam?

    <p>It affects the absorption of the beam</p> Signup and view all the answers

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