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Which technique averages image frames over time to reduce noise?

A.

Demodulation

B.

Persistence

C.

Compression

D.

Time gain compensation

Which artifact may be caused by incorrect color Dopplergain setting?

A.

Bleed/Blossoming

B.

Clutter/Haze

C.

Twinkle

D.

Aliasing

What is the term for an ultrasound system's ability to display low-level echoes?

A.

Slice thickness

B.

Axial resolution

C.

Sensitivity

D.

Lateral resolution

Which parameter indicates the potential for cavitation?

A.

Attenuation coefficient

B.

Mechanical index

C.

Thermal index

D.

Frame rate

Which factor determines elevational resolution?

A.

Beam depth

B.

Beam thickness

C.

Beam uniformity ratio

D.

Beam width

What is the result of increasing the wall filter setting during Doppler sampling?

A.

Diminished aliasing

B.

Decreased bandwidth

C.

Creation of spectral broadening

D.

Reduced display of low-frequency shifts

What is the primary factor that affects axial resolution?

A.

Focal zone

B.

Spatial pulse length

C.

Speed of sound

D.

Aperture

What is required when interrogating higher blood velocities at angles closer to zero degrees?

A.

Increased Doppler wall filter settings

B.

Decreased Doppler wall filter settings

C.

Increased Doppler scale settings

D.

Decreased Doppler scale settings

What is the term for the change in direction of a sound wave crossing a tissue boundary at an oblique angle?

A.

Reflection

B.

Absorption

C.

Refraction

D.

Attenuation

What is the relationship between overall gain and image brightness?

A.

The higher the overall gain, the brighter the image

B.

The lower the overall gain, the brighter the image

C.

The higher the overall gain, the darker the image

D.

There is no relationship between overall gain and image brightness