ARDMS SPI Ultrasound System Controls and Knobology 2

Question 1

Dynamic range in ultrasound imaging refers to the ratio of which two signal values?

Accepted Answer

Highest to lowest detectable echo amplitude

Answer

Transmit frequency to receive frequency

Answer

Near field length to far field length

Answer

Maximum depth to minimum depth

Question 2

Harmonic imaging reduces which type of artifact compared to fundamental imaging?

Accepted Answer

Near-field clutter and side lobe artifacts

Answer

Shadowing

Answer

Enhancement

Answer

Comet tail artifact

Question 3

The ensemble length (packet size) in color Doppler refers to:

Accepted Answer

The number of pulses per scan line used to produce color information

Answer

The width of the color box

Answer

The frequency of the color transmit pulse

Answer

The number of color frames averaged per second

Question 4

What is the primary effect of increasing transmit frequency on image quality?

Accepted Answer

Improved resolution but reduced penetration

Answer

Improved penetration but worse resolution

Answer

No change in resolution or penetration

Answer

Improved both resolution and penetration equally

Question 5

Which setting would a sonographer adjust to reduce aliasing in pulsed wave Doppler without switching to CW Doppler?

Accepted Answer

Increase PRF

Answer

Decrease wall filter

Answer

Decrease overall gain

Answer

Increase ensemble length

Question 6

Spatial compounding averages frames acquired from multiple steering angles primarily to:

Accepted Answer

Reduce speckle and improve tissue boundary definition

Answer

Increase frame rate

Answer

Increase penetration depth

Answer

Eliminate all shadowing artifacts