110L Ultrasound Physics Video Quizizz

What type of crystals do our ultrasound probes contain?

• Stone

• Amethyst

• Piezoelectric

• Swarovski

Areas where particles are pushed closer together and have increased pressure are called​ (a)   , while areas that are spread farther apart and have decreased pressure are labeled​ (b)  

• compressions
• rarefactions

What is the assumed speed of an ultrasound wave?

Smaller wavelengths and higher frequencies produce higher resolution of images.

• True

• False

What is the angle of incidence that produces the most specular reflection?​ (a)   ​ ​

• 90 degress
• 60 degress
• parallel
• 0 degrees

What is the term for the global amount of energy lost as a sound wave travels through a patient?

• Attenuation

• Rarefaction

• Reflection

• Scattering

Lower transmit frequencies produce higher levels of attenuation.

• True

• False

Ultrasound scan lines are closer together in the near field (closer to the probe) and farther apart in the _______ field (farther from the probe).

Temporal resolution is also known as the ________ and is measured in frames/second or Hertz (Hz).

• Frame rate

• near field

• far field

• depth

The focus (focal zone) is used to enhance specific areas of our image and produces the greatest resolution in those areas.

• True

• False