Ultrasound Quiz

What frequency range is typically used for diagnostic imaging in ultrasound?

• 0.1 - 2 MHz

• 2 - 15 MHz

• 15 - 30 MHz

• 30 - 50 MHz

What is the primary process by which ultrasound energy is transformed into heat?

• Refraction

• Diffraction

• Absorption

• Reflection

Which material has the highest acoustic impedance according to the provided data?

• Water

• Bone

• Fat

• Air

What is the term for the amount of material that reduces the intensity of ultrasound to one-half its original value?

• Half Value Layer (HVL)

• Acoustic Impedance

• Wavelength

• Intensity

In which mode does ultrasonography display a cross-section image of the examined area?

• C-mode

• B-mode

• A-mode

• M-mode

Which ultrasound mode is primarily used for measuring blood flow?

• C-mode

• B-mode

• A-mode

• Doppler mode

Which of the following conditions is necessary for scattering to occur?

• • The interfaces must be larger than the sound beam.

• • The interfaces must be larger than one wavelength.

• • The interfaces must be smaller than the sound beam

• • The wave must have a wavelength smaller than the size of the interfaces

Which of the following is NOT a result of a wave interacting with a boundary?

• • Reflection

• • Refraction

• • Attenuation

• • Diffraction