Contrast

Question 1

Ionic contrast media

Answer 1

•salts consisting of sodium or meglumine

Question 2

HOCM

Answer 2

• high-osmolar contrast media

* Conray

Question 3

Non-ionic contrast media

Answer 3

• non-salt
• often referred as LOCM low-osmolar contrast media
• iohexol (omnipaque)

Question 4

Contrast least likely to cause adverse effects/reaction

Answer 4

•non-ionic low osmolar

Question 5

Advantages of iOCM

Answer 5

• ISO-osmolar contrast media

* same osmolality as blood therefore better pt comfort and reduced side effects

Question 6

What contrast is considered non-ionic IOCM

Answer 6

• iohexol (omnipaque)
• iopamidol (isovue)
• ioversol (optitray)

Question 7

Enteral RCM administered how

Answer 7

•orally or rectally to highlight GI tract

Question 8

Two factors that pertain to bolus duration of iv contrast

Answer 8

• injection flow

* contrast volume

Question 9

Iohexol (omnipaque)

Answer 9

• non-ionic CM
• non-salt
• low-osmolar CM

Question 10

Iodixanol (visipaque)

Answer 10

•non ionic ISO-osmolar contrast

Question 11

After about ________ the iodinated contrast in blood plasma is reduced half of the administered volume

Answer 11

•2 hours

Question 12

A solution of _________% of iodine water soluble contrast is sufficient enough enough opacification

Answer 12

•2-5%

Question 13

Isodense

Answer 13

•unable to differentiate contrast in structure because everything is uniformly dense

Question 14

Does diverticulitis need contrast

Answer 14

•no contrast

Question 15

Does renal cyst need contrast

Answer 15

•yes the cystic area should be at or near zero attenuation

Question 16

CT Barium %

Answer 16

•2%

Question 17

The dosage of IV contrast media is

Answer 17

•2mL/kg of body weight

Question 18

Quantity of oral contrast for routine abdomen with a wait time of

Answer 18

• 450mL

* 60-90 min

Question 19

Mastectomy and iv’s

Answer 19

•IV should be performed on opposite arm if mastectomy to prevent fluid retention site does not allow drainage

Question 20

Determining flow rate

Answer 20

•volume/time

Question 21

The max contrast for peds is

Answer 21

•3mg per kg of body weight

Question 22

CT HU of unenhanced spleen

Answer 22

•+40 to +60 HU

Question 23

Corticomedullary phase

Answer 23

•late arterial 30-40 secs