Contrast

Question 1

types of compounds

Answer 1

metal salts
organic iodides
gaseous air

Question 2

[types] metal salts

Answer 2

bismuth, lead, barium

Question 3

[MC, poi] metal salts

Answer 3

barium sulfate, GI tract

Question 4

[types] organic iodides

Answer 4

water soluble iodides
CM:
Ionic: HOCM
Non-Ionic: LOCM
Ethiodized/Oily CM

Question 5

[indication] ethiodized CM/oil

Answer 5

lymphography - stay longer

Question 6

MRI contrast charac

Answer 6

-enhance and improve tissue property
-tissue specificity: attach to poi
-reasonable cleaning period: excrete
-low toxicity
-long shelf life

Question 7

classification-magnetic property

Answer 7

paramagnetic
superparamagnetic
diamagnetic

Question 8

[charac] paramagnetic

Answer 8

-slightly magnetic
-directly attaches to H atoms
-consists of metal ion bonded w/ organic moiety (DTPA)

Question 9

[metal ions-other name] paramagnetic ions

Answer 9

lanthanides
gadolinium, iron, manganese, dysprosium

Question 10

[PM] low dose = [..]

Answer 10

shortens T1

Question 11

[PM] high dose = [..]

Answer 11

T2 relaxation

Question 12

[term] how CM is stored

Answer 12

bioaccumulation methods/ways

Question 13

[gadolinium-based] category of bioaccumulation methods

Answer 13

-extracellular fluid agents (ECF)
-blood pool contrast agents
-organ-specific contrast agents

Question 14

[ex] organ specific contrast agents

Answer 14

iron oxide and liposomes

Question 15

[organ specific contrast agents]imported into cells thru phagocytosis

Answer 15

iron oxide

Question 16

distributed in extracellular space mimics iodinated CM of CT
renal excretion

Answer 16

extracellular fluid agents (ECF)

Question 17

remains in the intravascular space
excreted more slowly

Answer 17

blood pool contrast agents

Question 18

manganese chelates: [..]

Answer 18

manganese dipyridol diphosphonate (Mn-DPDP)

Question 19

manganese enhance [..]

Answer 19

t1 signal intensity

Question 20

[indication] manganese

Answer 20

hepatic lesion

Question 21

highly magnetic than paramagnetic
takes adv of blood
small solid particles w/c acts like ferromagnetic subs; suspended colloids

Answer 21

superparamagnetic

Question 22

[ex] superparamagnetic, reduces T2 signals

Answer 22

iron oxide particle

Question 23

[ex] superparamagnetic; still under investigation; prostate CA

Answer 23

iron platinum contrast agents

Question 24

no magnetic attraction

Answer 24

diamagnetic

Question 25

diamagnetic is used in [..]

Answer 25

chemical exchange saturation transfer (CEST)

Question 26

magnetization is transferred from other molecule to water molecule saturation

Answer 26

chemical exchange saturation

Question 27

[ex] diamagnetic

Answer 27

BaSO4 Clay-bentonite Kaolin Iron Ferric Ammonium Citrate

Question 28

[classi accdg to chemical design] positive CA

Answer 28

paramagnetic (except dyposium) brighter but vary bright on T1-W

Question 29

[classi accdg to chemical design] nagative CA

Answer 29

darker oxides: superparamagnetic reduces T2 signals

Question 30

CM introduction routes

Answer 30

IV Oral: GI tract scans