Echocardiogram Programming Fundamentals 5

Question 1

Which image optimization technique uses the second harmonic of the transmitted frequency to generate the receive image?

Accepted Answer

Tissue harmonic imaging

Answer

Tissue harmonic imaging receives at twice the transmitted frequency because harmonic signals build up in tissue and have less artifact than fundamental echoes.

Question 2

Spatial compounding in echocardiography combines images from multiple steering angles to achieve what benefit?

Accepted Answer

Reduced speckle and improved border delineation

Answer

Averaging frames steered from different angles reduces angle-dependent speckle noise and smooths tissue interfaces.

Question 3

During a contrast echocardiography study, which machine setting should be reduced to prevent microbubble destruction?

Accepted Answer

Mechanical index (MI)

Answer

High MI transmit power destroys contrast microbubbles; low-MI imaging protocols preserve bubble integrity for adequate opacification.

Question 4

What is the clinical consequence of using too large a sample volume in pulsed-wave Doppler?

Accepted Answer

Signals from adjacent structures contaminate the spectral trace

Answer

An overly large sample volume extends axially and can incorporate echoes from adjacent chambers, valves, or walls, creating a mixed or contaminated Doppler signal.

Question 5

A technician is using color Doppler to assess mitral regurgitation and notices the color jet appears larger after increasing PRF. What is the most likely explanation?

Accepted Answer

Higher PRF raises the Nyquist limit, reducing aliasing and decreasing the apparent jet area

Answer

Increasing PRF raises the velocity scale (Nyquist limit), so less aliasing occurs and the displayed jet area appears smaller, not larger — apparent jet size is scale-dependent.

(Echocardiogram) Certified Echocardiogram Technician Practice Test

(Echocardiogram) Certified Echocardiogram Technician Practice Test

Echocardiogram Programming Fundamentals 5