Diagnostic Ultrasound Quiz

What is the frequency range of audible sound?

• 16Hz - 20kHz

• >20kHz

• 20Hz - 20kHz

• 10Hz - 15kHz

What is the purpose of the transducer in diagnostic ultrasound?

• To produce ultrasound waves

• To analyze patient health

• To capture images

• All of the above

What happens to ultrasound waves at boundaries between different materials?

• They are absorbed

• They are reflected

• They are transmitted

• All of the above

What is the Doppler Effect in ultrasound?

• Change in frequency due to motion

• Change in amplitude

• Change in wavelength

• None of the above

What is the acoustic impedance formula?

• Z=pv

• Z=p/v

• Z=p+v

• Z=p-v

What is the intensity reflection coefficient?

• Defined as the ratio of reflected to incident intensity

• Defined as the ratio of transmitted to incident intensity

• Defined as the ratio of absorbed to incident intensity

• None of the above

What is the effect of absorption in ultrasound?

• Conversion of sound energy into heat

• Reflection of sound waves

• Transmission of sound waves

• None of the above

What is the purpose of Time Gain Compensation (TGC) in ultrasound?

• To increase the amplitude of return echoes

• To decrease the amplitude of return echoes

• To stabilize the image

• None of the above

What is the main use of Doppler ultrasound?

• To measure blood flow

• To create images

• To analyze tissue

• None of the above

What happens during refraction of ultrasound waves?

• Change in direction of the wave

• Change in frequency

• Change in amplitude

• None of the above