CET Technology & Digital Tools 3

Question 1

What is the primary function of the 'reject' control on an echocardiography machine?

Accepted Answer

Eliminates low-amplitude signals below a set threshold

Answer

The reject control suppresses low-level noise and clutter signals beneath a user-defined amplitude threshold, cleaning the image background.

Question 2

In 3D echocardiography, which acquisition mode captures a full-volume dataset triggered over multiple cardiac cycles?

Accepted Answer

Multi-beat full-volume

Answer

Multi-beat full-volume acquisition stitches together sub-volumes from 4–7 gated heartbeats to achieve high volume rate and spatial resolution.

Question 3

Which measurement tool in echo analysis software uses the proximal isovelocity surface area (PISA) method?

Accepted Answer

Regurgitant orifice area calculation

Answer

PISA calculates the effective regurgitant orifice area (EROA) by measuring the radius of the convergence hemisphere on color Doppler.

Question 4

When using tissue Doppler imaging (TDI) to measure myocardial velocities, what signal processing change distinguishes TDI from standard color Doppler?

Accepted Answer

High-pass filters removed; low-pass filters applied to retain low-velocity, high-amplitude myocardial signals

Answer

TDI reverses conventional Doppler filtering by removing high-pass wall filters to capture slow, high-amplitude myocardial motion while rejecting fast blood-flow signals.

Question 5

A technician needs to send echo reports to a cardiologist's electronic health record system. Which messaging standard is typically used for structured report data (not image transfer)?

Accepted Answer

HL7 v2.x or FHIR

Answer

HL7 v2.x messages (such as ORU^R01) or FHIR resources are the standards for transmitting structured clinical reports and results between healthcare IT systems.

(CET) Certified Echocardiography Technician Practice Test

(CET) Certified Echocardiography Technician Practice Test

CET Technology & Digital Tools 3