ECG110 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?

(a)  

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 (a)   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