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ECOS 2 Pre-Midterm > GIGU Imaging > Flashcards

Flashcards in GIGU Imaging Deck (42)
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1

What does a KUB flat plate x-ray screen for?

Acute abdominal disease

2

What does an Acute Abdominal Series x-ray help to identify?

Air under diaphragm, obstruction and fracture

3

Appropriate situations to order an Acute Abdominal Series x-ray?

Abdominal pain, distention or absent bowel sounds

4

With an x-ray, how does air appear?

Black

5

Why are KUBs and Acute Abdominal series x-rays good?

Quick and readily available

6

How does an ultrasound work and what appears white/black?

Sound waves reflected back from tissues due to density
- Solid structures appear white
- Fluid filled structures appear black

7

What is ultrasound good for imaging?

Size
Shape
Inflammation
STONES - gallbladder

8

Why is ultrasound a good imaging choice?

Quick, readily available and NO RADIATION
- Safe for pregnant women and children

9

What limits ultrasound?

Bowel gas

10

How will gallstones appear on an ultrasound?

White with an acoustic shadowing with them

11

List some disease that ultrasound is good for imaging?

Gallstones
Pancreatitis
Appendicitis
Ovarian/testicular masses
Pregnancy

12

What does a HIDA scan inject and what is it useful for?

Nuclear tagged material is taken up the liver and excreted into the bile
- Useful for patients that have persistent symptoms of gallstones with lack of evidence from an ultrasound

13

What can a HIDA scan evaluate?

Gallbladder FUNCTION and cystic duct patency

14

What are the disadvantages to a HIDA scan?

Takes time and cannot inject nuclear tagged material into pregnant women

15

What is something you could add to a HIDA scan?

CCK

16

What is the purpose of adding CCK to a HIDA scan?

Assesses gallbladder function by stimulating it to empty!

17

What percentage of gallbladder emptying is abnormal?

< 35-40% is abnormal

18

What are the disadvantages to CCK being added to a HIDA scan?

Takes time and causes extreme abdominal cramping

19

Purpose of a Fluoroscopy - Barium swallow?

Assess esophageal function AND anatomy

20

Disadvantages of a Fluoroscopy - Barium swallow?

High doses of radiation
- Multiple x-rays while swallowing a radiopaque fluid

21

What is a disease example that would need a Fluoroscopy - Barium swallow to identify?

Zenker's Diverticula - pouch in esophagus that causes dysphagia, halitosis, regurgitation and unintentional weight loss

22

What are the 2 types of CT contrast?

Oral and IV

23

What is oral contrast with a CT good for imaging?

Intraluminal assessment of intestines
- Masses, tumors, perforations, obstructions

24

What is IV contrast with a CT good for imaging?

Vascular relationships
- Aorta and renal arteries

25

What is CT WITH contrast good for imaging?

Pathologic conditions

26

Advantages of CT WITH contrast?

Fast, noninvasive and does NOT require consent

27

Disadvantages of CT WITH contrast?

High doses of radiation and contrast could cause an allergic reaction (fish)

28

CT WITHOUT contrast is the test of choice for what?

Kidney stones!!

29

What is an alternative choice for kidney stone testing for pregnant females?

Ultrasound of kidney and bladder

30

Out of the tests discussed, which have the highest radiation?

CT!