Ultrasound Therapy in Physical Therapy
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Questions and Answers

What is the result of the ultrasound wave losing energy as it travels through a medium?

  • Diffraction
  • Interference
  • Refraction
  • Attenuation (correct)
  • What is the main reason for refraction of ultrasound waves?

  • Change in acoustic impedance at the interface (correct)
  • Change in propagation velocity
  • Change in medium density
  • Change in ultrasound wave frequency
  • What is the formula to calculate acoustic impedance (Z)?

  • Z = v / r
  • Z = r - v
  • Z = r * v (correct)
  • Z = r / v
  • What is the purpose of moving the ultrasound head in a circular path during therapy?

    <p>To reduce the risk of deep burns due to excessive heat production</p> Signup and view all the answers

    What is the term for the amount of energy absorbed by the medium as the ultrasound wave travels through it?

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

    What is the effect of constructive interference on the ultrasound wave?

    <p>It increases the amplitude of the ultrasound wave</p> Signup and view all the answers

    What is the purpose of using an acoustic lens in ultrasound imaging?

    <p>To enhance image quality by refraction</p> Signup and view all the answers

    What is the result of standing waves in ultrasound applications?

    <p>Deep burns due to excessive heat production</p> Signup and view all the answers

    What is the component of the ultrasound machine that produces the ultrasound wave?

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

    What is the effect of acoustic impedance mismatch on the ultrasound wave?

    <p>It affects the refraction of the ultrasound wave</p> Signup and view all the answers

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