*Pulse Echo Instrumentation Review

Question 1

In B-mode display, the y-axis represents

Answer 1

Penetration depth

Question 2

*Frame rate is determined by penetration depth and

Answer 2

Propagation speed of the medium

Question 3

Propagation speed of a medium limits what?

Answer 3

Penetration depth

Question 4

Line density is directly related to PRF, T/F

Answer 4

True

Question 5

Output of a diagnostic US system ranges between just above zero to ____ volts

Answer 5

500 volts

Question 6

Describe the function of the transducer:

Delivers _____ voltages to the ____

Answer 6

Delivers electrical voltages to the memory

Question 7

What (2) constitutes a transmission channel?

Answer 7

An independent pulse delay and an element

Question 8

Volume picture element

Answer 8

Voxel

Question 9

Most likely to be related to pixel density

Answer 9

Spatial resolution

Question 10

What improves contrast resolution

Answer 10

B-colour

Question 11

Pre-processing vs postprocessing

Persistence
Cine loop
3D acquisition
3D presentation

Answer 11

Persistence = post processing
Cine loop = pre processing
3D acquisition = pre processing
3D presentation = post processing

Question 12

What does write zoom do

Answer 12

Increases number of pixels per scan line in matrix

Question 13

When doppler gain is too high, which artifact most likely to occur?

Answer 13

Mirror image

Question 14

Spaces between the active elements of a phased array transducer result in

Answer 14

The production of grating lobes