ARDMS SPI Ultrasound System Controls and Knobology

Question 1

Which control adjusts the amplification of returning ultrasound signals uniformly across all depths?

Accepted Answer

Overall gain

Answer

Time gain compensation

Answer

Dynamic range

Answer

Wall filter

Question 2

Time gain compensation (TGC) is used to correct for which phenomenon?

Accepted Answer

Attenuation with depth

Answer

Aliasing

Answer

Reverberation

Answer

Side lobe artifact

Question 3

Increasing the depth setting on an ultrasound system will have what effect on frame rate?

Accepted Answer

Frame rate decreases

Answer

Frame rate increases

Answer

Frame rate is unaffected

Answer

Frame rate doubles

Question 4

The pulse repetition frequency (PRF) setting directly affects which Doppler parameter?

Accepted Answer

Maximum detectable velocity (Nyquist limit)

Answer

Beam steering angle

Answer

Spectral baseline position only

Answer

Wall filter cutoff

Question 5

What does the wall filter (high-pass filter) in Doppler mode eliminate?

Accepted Answer

Low-frequency signals from slow-moving vessel walls

Answer

High-frequency signals from fast blood flow

Answer

Side lobe signals from adjacent structures

Answer

Mirror image artifacts

Question 6

Which control is adjusted to change the size of the color Doppler sample box?

Accepted Answer

Color box size/region of interest

Answer

PRF

Answer

Color gain

Answer

Ensemble length