Medical Imaging

Question 1

contraindications to IV contrast

Answer 1

(MADD Failure)
Multiple Myeloma
Adverse reaction previously
DM
Dehydration
Failure (renal, severe heart)

Question 2

MRI scan considered a pathologic scan highlighting edematous areas

Answer 2

T2-Weighted MR Imaging

Question 3

fluid (dark/bright) vs fat in T2-Weighted MRI

Answer 3

fluid - bright/hyperintense
fat - dark/hypointense

(World War II = Water White T2)

Question 4

contrast agent for xray

Answer 4

barium - radiopaque subs that helps delineate intraluminal anatomy, demonstrate patency, lumen integrity or large filling defects

Question 5

contrast agent for CT

Answer 5

iodinated agents - under fluoroscopy may give info on fxn of an organ

Question 6

contrast agent for MRI

Answer 6

Gadolinium Chelates - highlights highly vascular structures (e.g. tumors)

Question 7

main contraindication to contrast agents

Answer 7

previous adverse reaction

Question 8

contraindications for barium enema

Answer 8

toxic megacolon
acute colitis
suspected perforation

Question 9

the use of this contrast agen poses a risk of nephrogenic systemic fibrosis in px with end-stage renal dse

Answer 9

Gadolinium Chelates

Question 10

contrast agent for U/S allowing for echo enhancement of vascular structures or cavities

Answer 10

microbubbles (IV)

Question 11

contrast agents contraindicated in individuals with right to left cardiac shunts

Answer 11

microbubbles

Question 12

cardiomegaly on xray = cardiothoracic ratio of ____

Answer 12

> 0.5 on PA

Question 13

indications of standard CT chest

Answer 13

CXR abnormality
pleural & mediastinal abnormality
lung cancer staging
cancer ff up
Empyema vs Abscess

Question 14

indications of low dose CT chest

Answer 14

lung CA screening
f/up infections
lung transplant
metastases

Question 15

indications of CTA

Answer 15

PE
Aortic aneurysm
Aortic dissection