Ch. 13 (Real Time Imaging)

Question 1

what is real-time imaging

Answer 1

frames displayed in rapid sequence

illusion of motion

Question 2

what is static scanning

Answer 2

series of images to create a picture (antique)

Question 3

ability to accurately image structures

Answer 3

resolution

Question 4

ability to create numerous frames per second

Answer 4

frame rate

Question 5

what is frame rate determined by

Answer 5

speed and depth

Question 6

units of frame rate

Answer 6

Hz

Question 7

how is frame rate related to time for one frame (t frame)

Answer 7

inversely

reciprocals

Question 8

can frame rate be changed by the sonographer?

Answer 8

yes

Question 9

what affects frame rate? or how can we adjust it on the US system?

Answer 9

depth and pulses per frame

Question 10

ability to precisely position moving structures from instant to instant
(accuracy in time)

Answer 10

temporal resolution

temporal = time

Question 11

temporal resolution is determined by

Answer 11

frame rate

Question 12

units of temporal resolution

Answer 12

Hz

Question 13

how is temporal resolution related to frame rate

Answer 13

directly

Question 14

system settings that determine frame rate

Answer 14

depth
# of pulses in each picture

Question 15

relationship between imaging depth and temporal resolution

Answer 15

inverse

Question 16

relationship between depth and frame rate

Answer 16

inverse

Question 17

factors determining number of pulses per frame

Answer 17

number of focal points
sector size
line density

Question 18

how can sonographers change temporal resolution

Answer 18

depth
pulses per scan line
sector size

Question 19

main advantage of multiple focal zones

Answer 19

better lateral resolution

Question 20

main advantage of high line density

Answer 20

higher spatial resolution

Question 21

relationship between pulses per frame and frame rate

Answer 21

inverse

Question 22

relationship between sector size and t frame

Answer 22

inverse

Question 23

factors that affect temporal resolution

Answer 23

depth
line density
focus
sector size