UTC Ultrasound Technologist Equipment Operation 3

Question 1

Which mode of ultrasound displays a graph of echo amplitude versus time along a single line of sight?

Accepted Answer

A-mode

Answer

A-mode (amplitude mode) displays echo strength as vertical spikes along a horizontal time axis, representing a single scan line.

Question 2

M-mode (motion mode) ultrasound is particularly useful for evaluating:

Accepted Answer

Cardiac valve motion and wall movement

Answer

M-mode records motion of structures along a single scan line over time, making it ideal for assessing cardiac valve motion and chamber wall excursion.

Question 3

What transducer characteristic most directly determines axial resolution?

Accepted Answer

Pulse spatial length (pulse duration × propagation speed)

Answer

Axial resolution equals half the spatial pulse length; shorter pulses (higher frequency, fewer cycles) produce better axial resolution.

Question 4

A sonographer notices 'acoustic enhancement' (posterior enhancement) posterior to a structure. This indicates the structure is most likely:

Accepted Answer

Fluid-filled with low attenuation

Answer

Fluid-filled structures attenuate sound less than surrounding tissue, so the region posterior to them appears brighter — a phenomenon called posterior acoustic enhancement.

Question 5

Which Doppler technique allows simultaneous 2D imaging and pulsed Doppler sampling from a specific depth?

Accepted Answer

Duplex Doppler

Answer

Duplex Doppler combines real-time B-mode imaging with pulsed-wave Doppler, allowing precise placement of the sample gate at a specific anatomical location.

(UTC) Ultrasound Technologist Certification Practice Test

(UTC) Ultrasound Technologist Certification Practice Test

UTC Ultrasound Technologist Equipment Operation 3