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

Dynamic range is the ratio of the largest to the smallest signal amplitude the system can display, measured in decibels.

Question 2

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

Accepted Answer

Near-field clutter and side lobe artifacts

Answer

Tissue harmonic imaging uses the second harmonic frequency generated within tissue, which reduces near-field clutter and side lobe artifacts.

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

Ensemble length is the number of pulses fired along each color Doppler scan line; larger ensemble lengths improve velocity accuracy but reduce frame rate.

Question 4

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

Accepted Answer

Improved resolution but reduced penetration

Answer

Higher frequencies produce shorter wavelengths, improving spatial resolution, but are attenuated more rapidly, reducing depth penetration.

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

Increasing PRF raises the Nyquist limit, allowing higher velocities to be measured before aliasing occurs.

ARDMS SPI - ARDMS Sonography Principles and Instrumentation Practice Test

ARDMS SPI - ARDMS Sonography Principles and Instrumentation Practice Test

ARDMS SPI Ultrasound System Controls and Knobology 2