Echocardiogram System Architecture and Design 2

Question 1

Which component in a modern echocardiography system is responsible for converting electrical signals into ultrasound waves?

Accepted Answer

Piezoelectric crystal transducer

Answer

Piezoelectric crystals in the transducer convert electrical energy into mechanical (ultrasound) vibrations and vice versa.

Question 2

In phased array transducer design, steering the ultrasound beam in different directions is achieved by:

Accepted Answer

Applying sequential time delays to individual elements

Answer

Phased arrays steer the beam electronically by introducing precise time delays across individual transducer elements to create constructive interference at the desired angle.

Question 3

The digital scan converter in an echocardiography system serves primarily to:

Accepted Answer

Convert polar scan data to a Cartesian display format

Answer

The digital scan converter maps sector-format (polar) ultrasound data into the rectangular pixel grid of a video display.

Question 4

Harmonic imaging improves image quality primarily because harmonics:

Accepted Answer

Are generated within tissue and have less near-field artifact

Answer

Tissue harmonic signals are generated progressively as the wave propagates, building up away from the transducer face, resulting in fewer near-field reverberation artifacts.

Question 5

Spatial compounding in echocardiographic system design refers to:

Accepted Answer

Averaging images acquired from multiple steering angles to reduce speckle

Answer

Spatial compounding averages frames acquired at several beam angles, which reduces speckle and improves tissue boundary definition.

(Echocardiogram) Certified Echocardiogram Technician Practice Test

(Echocardiogram) Certified Echocardiogram Technician Practice Test

Echocardiogram System Architecture and Design 2