Echocardiogram System Architecture and Design 3

Question 1

The aperture of an ultrasound transducer array primarily affects:

Accepted Answer

Lateral resolution through control of beam width

Answer

A larger aperture focuses acoustic energy more tightly, narrowing beam width and improving lateral resolution.

Question 2

In 3D echocardiography matrix array transducers, elements are arranged in:

Accepted Answer

A 2D grid enabling steering in both azimuth and elevation planes

Answer

Matrix arrays contain thousands of elements in a 2D grid, allowing full electronic steering and focusing in both planes needed to acquire volumetric data.

Question 3

Dynamic receive focusing in echocardiography systems means that:

Accepted Answer

The receive focus is continuously updated as echoes return from increasing depths

Answer

Dynamic receive focusing applies continuously changing time delays to received signals so the system is always focused at the depth from which echoes are currently returning.

Question 4

Parallel receive beamforming in echocardiography is primarily used to:

Accepted Answer

Increase frame rate by acquiring multiple receive lines per transmit event

Answer

By processing several receive lines simultaneously from one transmit pulse, parallel beamforming allows higher frame rates without sacrificing line density.

Question 5

The Nyquist limit in pulsed-wave Doppler echocardiography is equal to:

Accepted Answer

One-half of the pulse repetition frequency

Answer

The Nyquist limit equals PRF/2; Doppler shifts exceeding this value alias (wrap around) on the velocity display.

(Echocardiogram) Certified Echocardiogram Technician Practice Test

(Echocardiogram) Certified Echocardiogram Technician Practice Test

Echocardiogram System Architecture and Design 3