Theory 2

Question 1

Typical windowing for soft tissue

Answer 1

450ww/50wl OR 500ww/50wl

Question 2

Typical windowing for liver

Answer 2

150ww/70wl

Question 3

Typical windowing for Lung

Answer 3

1500ww/-600wl OR 1500ww/-700wl

Question 4

Typical windowing for bone

Answer 4

2000ww/600wl

Question 5

If the initial scan doesnt demonstrate the margin between pancreas and duodenum what would you do?

Answer 5

Give more oral contrast and scan patient in right decubitus

Question 6

Suspected stone? what contrast media should be used?

Answer 6

low attenuating CM or water

Question 7

A homogenous adrenal mass was found to have less than 10 HU on an unenhanced CT. is it benign or malignant?

Answer 7

benign

Question 8

Washout can only be evaluated if…

Answer 8

a delayed image was acquired

Question 9

What does fatty infiltrates do to the livers attenuating capabilities?

Answer 9

lowers it

Question 10

How much higher is the HU for a healthy liver compared to the spleen?

Answer 10

roughly 10 HUs

Question 11

Typical CM arrival time for the main pulmonary artery

Answer 11

9-15 seconds

Question 12

Typical CM arrival time for the Carotids

Answer 12

16-24 seconds

Question 13

Typical CM arrival time for the liver veins

Answer 13

50-80 seconds

Question 14

Most common cause for hospitalization in people 10-54 years old

Answer 14

Digestive system disease

Question 15

What are the 3 general phases of tissue enhancement? (each can have 2 names)

Answer 15

Bolus phase/Arterial
Nonequilibrium phase/venous
Equilibrium phase/delayed