Imaging Overview

Question 1

What are the major advantages of US?

Answer 1

No radiation
Cheap
Easily accessible

Question 2

What are the major advantages of X-Ray?

Answer 2

Cheap
Easily accessible
Fast

Question 3

What are the major advantages of Fluoroscopy?

Answer 3

Decreased radiation exposure

Real-time visualization

Question 4

What are the major advantages of CT?

Answer 4

Reasonable cost
Easily accessible
3D image

Question 5

What are the major advantages of MRI?

Answer 5

No radiation

Precise ST detail

Question 6

When would you use a T1 MRI?

Answer 6

Looking at anatomical detail, fat containing structures, and subacute hemorrhages

Question 7

When would you use a T2 MRI?

Answer 7

Looking at pathological structures (edema, tumor, infarct)

Question 8

How does the appearance of water differ in T1 vs T2 weighted MRI’s?

Answer 8

T1 –> dark

T2 –> white

Question 9

Which organs are most sensitive to radiation?

Answer 9

Lymphoid, bone marrow, testes/ovaries, SI (rapidly dividing cells)

Question 10

What contrasts are used for GI imaging?

Answer 10

Barium, Gastrograffin

Question 11

What IV contrast is used?

Answer 11

Iodine-based

Question 12

What contrast is used for MRI?

Answer 12

Gadolinium

Question 13

What consideration needs to be accounted for in pts taking Metformin?

Answer 13

Adding contrast can lead to lactic acidosis

Question 14

If Gadolinium is used during an MRI, which weight are the images taken in, T1 or T2?

Answer 14

T1