Chapter 13 - Real Time Imaging

Question 1

____ scanning is when images are displayed one frame at a time (like a photograph)

Answer 1

Static

Question 2

____ imaging is when each frame is created and displayed very quickly, providing the impression os constant motion (like a movie)

Answer 2

Real time

Question 3

____ ____ is the number of frames (images) produces in one second.

Answer 3

Frame rate

Question 4

Frame rate is determined by what two things?

Answer 4

Sound’s speed in a medium and depth of imaging

Question 5

What is the unit for frame rate?

Answer 5

Hertz or per second

Question 6

____ ____ is the ability to accurately determine the position of an anatomic structure at a particular instant in time.

Answer 6

Temporal resolution

Question 7

Temporal resolution is determined by what?

Answer 7

Frame rate

Question 8

A high frame rate ____ temporal resolution.

Answer 8

Improves

Question 9

A low frame rate ____ temporal resolution.

Answer 9

Degrates

Question 10

____ is the time it takes the system to create one frame.

Answer 10

T-frame

Question 11

Frame rate and T-frame are ___ related and ____.

Answer 11

Inversely; reciprocals

Question 12

Imaging depth and frame rate are ____ related.

Answer 12

Inversely

Question 13

Pulses per frame and frames rate are ____ related.

Answer 13

Inversely

Question 14

What are the factors that affect the number of pulses creating an image?

Answer 14

• Number of pulses
• Sector size
• Line density

Question 15

Multi-focusing ____ frame rate and ____ temporal resoultion.

Answer 15

Decreases; diminishes

Question 16

High line density improves ____ resolution.

Answer 16

Spatial

Question 17

Multi focus improves ____ resolution.

Answer 17

Lateral

Question 18

Increasing the sector size leads to a ____ temporal resolution.

Answer 18

Decreased

Question 19

Reducing the sector size leads to ____ temporal resolution.

Answer 19

Increased

Question 20

What is the spacing between sound beams?

Answer 20

Line density

Question 21

Line density and frame rate are ____ related.

Answer 21

Inversely

Question 22

If the image depth is increased, how is temporal resolution affected?

Answer 22

It decreases

Question 23

What type of imaging is A mode primarily used for?

Answer 23

Opthamology

Question 24

If line density is increased, what happens to frame rate and spatial resolution?

Answer 24

Frame rate decreases; spatial resolution increases

Question 25

What is the main factor in determining frame rate?

Answer 25

Imaging depth

Question 26

What was the first form of grayscale imaging?

Answer 26

B-mode