Ultrasound imaging (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
ShowHide
Practise the questions
10 questions from this quiz
What type of wave is ultrasound?
What type of wave is ultrasound?
Longitudinal wave
What is the typical frequency range of ultrasound in medical imaging?
What is the typical frequency range of ultrasound in medical imaging?
MHz to MHz
What happens when a potential difference is applied to a piezoelectric material?
What happens when a potential difference is applied to a piezoelectric material?
It undergoes mechanical deformation
What is the formula for acoustic impedance ?
What is the formula for acoustic impedance ?
Why is a coupling medium used between the transducer and skin?
Why is a coupling medium used between the transducer and skin?
To remove air which would reflect waves
What is the purpose of damping in an ultrasound transducer?
What is the purpose of damping in an ultrasound transducer?
To produce short pulses
What does A-Scan typically use to determine the depth of structures?
What does A-Scan typically use to determine the depth of structures?
Time delay
In B-Scan imaging, what determines the brightness of each point in the image?
In B-Scan imaging, what determines the brightness of each point in the image?
Amplitude of reflected signal
What mainly causes attenuation of ultrasound waves as they travel through tissue?
What mainly causes attenuation of ultrasound waves as they travel through tissue?
Scattering and absorption
What is a major disadvantage of ultrasound imaging?
What is a major disadvantage of ultrasound imaging?
Limited by bone and air