Echocardiogram Programming Fundamentals 3

Question 1

Which machine control adjusts the lateral resolution of a 2D echocardiographic image?

Accepted Answer

Focus zone placement

Answer

Placing the focus zone at the depth of interest narrows the ultrasound beam there, maximizing lateral resolution at that level.

Question 2

When using continuous-wave Doppler, what distinguishes it from pulsed-wave Doppler in terms of machine programming?

Accepted Answer

CW simultaneously transmits and receives, eliminating range ambiguity but lacking depth discrimination

Answer

CW Doppler uses separate transmitting and receiving elements operating simultaneously, allowing measurement of high velocities without aliasing but with no depth selectivity.

Question 3

A technician increases the wall filter setting during spectral Doppler. What is the expected result?

Accepted Answer

Low-velocity, high-amplitude signals from walls are suppressed

Answer

The wall filter (high-pass filter) removes slow-moving, high-amplitude clutter from cardiac walls and valves, cleaning up the spectral display.

Question 4

What is the purpose of the 'dynamic range' or 'compression' control on an echo machine?

Accepted Answer

Controls the range of echo amplitudes displayed from weakest to strongest

Answer

Dynamic range determines how many decibels of signal amplitude are mapped to the gray scale, affecting the contrast between strong and weak reflectors.

Question 5

To best visualize left atrial appendage thrombus with transesophageal echo, which imaging frequency should be selected?

Accepted Answer

Higher frequency (5–7 MHz) for improved near-field resolution

Answer

TEE probes at higher frequencies provide superior near-field resolution, critical for detecting small thrombi in the left atrial appendage.

(Echocardiogram) Certified Echocardiogram Technician Practice Test

(Echocardiogram) Certified Echocardiogram Technician Practice Test

Echocardiogram Programming Fundamentals 3