Physics Mode 6

Question 1

What has the worst temporal resolution

Answer 1

Color doppler

Question 2

Color frame time calculation

Answer 2

Color frame time = 13 micros/cm x depth/acoustic line x acoustic line/color packet x color packet/display line

Question 3

Total frame time calculation

Answer 3

Total frame = color frame + 2D frame

Question 4

Flow direction in color doppler

Answer 4

Angle of flow always between steered beam and head of flow (direction of flow)

Question 5

Pro and con of color angio doppler

Answer 5

Power Doppler
Pro:
1) more sensitivity to low flow
2) better filling in small vessels
3) less angle dependent

Con:

1) no flow direction
2) less apparent variation in flow patterns