Abdomen

Question 1

what is the general guideline for oral contrast admin

Answer 1

750-1500ml 30-120 min prior to scan

Question 2

average WL and WW settings for ST window

Answer 2

WL: 40 WW:350

Question 3

average WL and WW settings for lung bases window

Answer 3

WL: -450 WW: 1400

Question 4

average WL and WW settings for bone window

Answer 4

WL: 300 WW:2000

Question 5

what are the phases of hepatic imaging

Answer 5

1. arterial phase
2. portal (hepatic venous) phase
3. equilibrium phase

Question 6

what is the delay for an early arterial phase and what is it used for

Answer 6

15-20 seconds for an angio liver

Question 7

when would you use a delayed phase for liver imaging and what is the delay

Answer 7

for fill-in of a hemangioma; delay is 5-20 minutes

Question 8

list the delay times for the following:
1. arterial phase
2. portal (hepatic venous) phase
3. equilibrium phase

Answer 8

1. 25-35 seconds
2. 60-70 seconds
3. 2-3 minutes

Question 9

what are the HU units for an enhanced spleen and how many HU units less than the liver

Answer 9

+40-60 HU; 10 HU less than the liver

Question 10

what is the optimal phase for the spleen to be imaged in

Answer 10

portal venous

Question 11

what is the delay for a delayed arterial pancreas

Answer 11

35-45 seconds