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10 Questions

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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?

To reduce the risk of deep burns due to excessive heat production 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?

Attenuation Signup and view all the answers

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

It increases the amplitude of the ultrasound wave Signup and view all the answers

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

To enhance image quality by refraction Signup and view all the answers

What is the result of standing waves in ultrasound applications?

Deep burns due to excessive heat production Signup and view all the answers

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

Transducer Signup and view all the answers

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

It affects the refraction of the ultrasound wave Signup and view all the answers