MRI Contrast Agents

Question 1

How do contrast agents change the T1 times of water around them?

Answer 1

they make the water brighter

Question 2

What is the medical imaging test that involves injecting a contrast dye directly into the joint?

Answer 2

arthrogram

Question 3

Is gadolinium toxic to the human body?

Answer 3

yes

Question 4

What allows gadolinium to be safely used in the human body?

Answer 4

chelates (surround gadolinium, except for 1 spot for water to enter)

Question 5

*Gadolinium used as negative contrast?

Answer 5

speeds up and shorten T2 and T2* time
(darker contrast)

Question 6

What does NSF stand for?

Answer 6

nephrogenic systemic fibrosis

Question 7

How long does it take for Gad to be eliminated out of the body?

Answer 7

80% in 3 hours
98% in 1 week

Question 8

What is the normal range of glomerular filtration rate?

Answer 8

30-60

Question 9

What are other contrast agents used as negative oral contrast?

Answer 9

Geritol and blueberry/pineapple/grape juices

Question 10

What does Gadolinium speed up?

Answer 10

all relaxation

Question 11

Gadolinium used as negative contrast?

Answer 11

speeds up and spins T1 recovery time of water