CCI: Physics of Ultrasound-URR
Questions and Answers Latest Version
(2024/2025) 100% Pass
What is the primary purpose of ultrasound in medical imaging?
A) To measure the size of organs
✔✔B) To create images of internal body structures using sound waves
C) To detect electrical activity in the heart
D) To monitor blood pressure
Which of the following best describes the term "frequency" in ultrasound imaging?
A) The speed at which sound waves travel through a medium
✔✔B) The number of sound wave cycles per second
C) The amount of energy in the sound wave
D) The distance between two consecutive sound waves
What is the role of the transducer in ultrasound imaging?
✔✔A) To send and receive sound waves
B) To amplify the sound waves
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,C) To convert electrical signals into sound waves
D) To filter out noise from the image
Which of the following is the most common frequency range for diagnostic ultrasound?
A) 1-2 MHz
✔✔B) 2-18 MHz
C) 20-40 MHz
D) 30-60 MHz
How does increasing the frequency of ultrasound waves affect image resolution?
A) Decreases resolution but increases penetration
✔✔B) Increases resolution but decreases penetration
C) No effect on resolution or penetration
D) Increases both resolution and penetration equally
What is acoustic impedance in the context of ultrasound?
✔✔A) The resistance of a tissue to the passage of ultrasound waves
B) The speed of sound waves through a medium
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,C) The power of the ultrasound wave
D) The frequency of sound waves
Which of the following factors can affect the penetration of ultrasound waves?
A) Frequency of the sound wave
B) The density of the tissue
✔✔C) Both frequency and tissue density
D) Only the thickness of the tissue
What happens when an ultrasound wave encounters a boundary between two tissues with
different acoustic impedances?
✔✔A) Some of the wave is reflected, and some is transmitted into the second tissue
B) All the wave is transmitted into the second tissue
C) The wave is absorbed by the tissue
D) The wave is completely reflected back
What is the purpose of gel during an ultrasound exam?
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, ✔✔A) To eliminate air between the skin and the transducer, allowing better transmission of
sound waves
B) To cool down the transducer
C) To increase the frequency of the sound waves
D) To enhance the image contrast
Which of the following is an example of a mechanical wave?
A) Light
✔✔B) Sound
C) X-rays
D) Radio waves
What type of waves are used in diagnostic ultrasound?
A) Electromagnetic waves
✔✔B) Mechanical waves
C) Radio waves
D) Light waves
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Questions and Answers Latest Version
(2024/2025) 100% Pass
What is the primary purpose of ultrasound in medical imaging?
A) To measure the size of organs
✔✔B) To create images of internal body structures using sound waves
C) To detect electrical activity in the heart
D) To monitor blood pressure
Which of the following best describes the term "frequency" in ultrasound imaging?
A) The speed at which sound waves travel through a medium
✔✔B) The number of sound wave cycles per second
C) The amount of energy in the sound wave
D) The distance between two consecutive sound waves
What is the role of the transducer in ultrasound imaging?
✔✔A) To send and receive sound waves
B) To amplify the sound waves
1
,C) To convert electrical signals into sound waves
D) To filter out noise from the image
Which of the following is the most common frequency range for diagnostic ultrasound?
A) 1-2 MHz
✔✔B) 2-18 MHz
C) 20-40 MHz
D) 30-60 MHz
How does increasing the frequency of ultrasound waves affect image resolution?
A) Decreases resolution but increases penetration
✔✔B) Increases resolution but decreases penetration
C) No effect on resolution or penetration
D) Increases both resolution and penetration equally
What is acoustic impedance in the context of ultrasound?
✔✔A) The resistance of a tissue to the passage of ultrasound waves
B) The speed of sound waves through a medium
2
,C) The power of the ultrasound wave
D) The frequency of sound waves
Which of the following factors can affect the penetration of ultrasound waves?
A) Frequency of the sound wave
B) The density of the tissue
✔✔C) Both frequency and tissue density
D) Only the thickness of the tissue
What happens when an ultrasound wave encounters a boundary between two tissues with
different acoustic impedances?
✔✔A) Some of the wave is reflected, and some is transmitted into the second tissue
B) All the wave is transmitted into the second tissue
C) The wave is absorbed by the tissue
D) The wave is completely reflected back
What is the purpose of gel during an ultrasound exam?
3
, ✔✔A) To eliminate air between the skin and the transducer, allowing better transmission of
sound waves
B) To cool down the transducer
C) To increase the frequency of the sound waves
D) To enhance the image contrast
Which of the following is an example of a mechanical wave?
A) Light
✔✔B) Sound
C) X-rays
D) Radio waves
What type of waves are used in diagnostic ultrasound?
A) Electromagnetic waves
✔✔B) Mechanical waves
C) Radio waves
D) Light waves
4
